Create a Plan Position Indicator (PPI) Plot

A Plan Position Indicator (PPI) plot is a common plot requested by radar scientists. Let’s show how to create this plot using xradar

Imports

import cmweather  # noqa
from open_radar_data import DATASETS

import xradar as xd

import cartopy
import matplotlib.pyplot as plt

Read in some data

Fetching CfRadial1 radar data file from open-radar-data repository.

filename = DATASETS.fetch("cfrad.20080604_002217_000_SPOL_v36_SUR.nc")

Read the data using the cfradial1 engine

radar = xd.io.open_cfradial1_datatree(filename, first_dim="auto")
display(radar)

<xarray.DatasetView> Size: 477B
Dimensions:              (sweep: 9)
Dimensions without coordinates: sweep
Data variables:
    volume_number        int32 4B ...
    platform_type        |S32 32B ...
    primary_axis         |S32 32B ...
    status_str           |S1 1B ...
    instrument_type      |S32 32B ...
    time_coverage_start  |S32 32B ...
    time_coverage_end    |S32 32B ...
    latitude             float64 8B ...
    longitude            float64 8B ...
    altitude             float64 8B ...
    sweep_group_name     (sweep) <U7 252B 'sweep_0' 'sweep_1' ... 'sweep_8'
    sweep_fixed_angle    (sweep) float32 36B ...
Attributes: (12/13)
    Conventions:         CF/Radial instrument_parameters radar_parameters rad...
    version:             1.2
    title:               TIMREX
    institution:
    references:
    source:
    ...                  ...
    comment:
    instrument_name:     SPOLRVP8
    site_name:
    scan_name:
    scan_id:             0
    platform_is_mobile:  false

datatree.DataTree

• Groups: (12)
  <xarray.DatasetView> Size: 20B
  Dimensions:                   ()
  Data variables:
      radar_receiver_bandwidth  float32 4B ...
      radar_beam_width_h        float32 4B ...
      radar_antenna_gain_h      float32 4B ...
      radar_beam_width_v        float32 4B ...
      radar_antenna_gain_v      float32 4B ...

  radar_parameters

  • Groups: (0)
  • Dimensions:
  • Coordinates: (0)
  • Data variables: (5)
    • radar_receiver_bandwidth
      ()
      float32
      ...

      standard_name :

      radar_receiver_bandwidth

      units :

      s-1

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_beam_width_h
      ()
      float32
      ...

      standard_name :

      half_power_radar_beam_width_h_channel

      units :

      degrees

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_antenna_gain_h
      ()
      float32
      ...

      standard_name :

      nominal_radar_antenna_gain_h_channel

      units :

      dB

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_beam_width_v
      ()
      float32
      ...

      standard_name :

      half_power_radar_beam_width_v_channel

      units :

      degrees

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_antenna_gain_v
      ()
      float32
      ...

      standard_name :

      nominal_radar_antenna_gain_v_channel

      units :

      dB

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 212B
  Dimensions:                   ()
  Data variables: (12/45)
      time                      |S32 32B ...
      pulse_width               timedelta64[ns] 8B ...
      xmit_power_h              float32 4B ...
      xmit_power_v              float32 4B ...
      two_way_waveguide_loss_h  float32 4B ...
      two_way_waveguide_loss_v  float32 4B ...
      ...                        ...
      test_power_h              float32 4B ...
      test_power_v              float32 4B ...
      receiver_slope_hc         float32 4B ...
      receiver_slope_vc         float32 4B ...
      receiver_slope_hx         float32 4B ...
      receiver_slope_vx         float32 4B ...

  radar_calibration

  • Groups: (0)
  • Dimensions:
  • Coordinates: (0)
  • Data variables: (45)
    • time
      ()
      |S32
      ...

      standard_name :

      radar_calibration_time_utc

      meta_group :

      radar_calibration

      [1 values with dtype=|S32]

    • pulse_width
      ()
      timedelta64[ns]
      ...

      standard_name :

      radar_calibration_pulse_width

      meta_group :

      radar_calibration

      [1 values with dtype=timedelta64[ns]]

    • xmit_power_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_xmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • xmit_power_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_xmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_waveguide_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_waveguide_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_waveguide_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_waveguide_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_radome_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_radome_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_radome_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_radome_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_mismatch_loss
      ()
      float32
      ...

      standard_name :

      radar_calibration_receiver_mismatch_loss

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • radar_constant_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_constant_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • radar_constant_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_constant_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • antenna_gain_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_antenna_gain_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • antenna_gain_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_antenna_gain_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_h_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_v_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_h_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_v_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_h_co_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_v_co_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_h_cross_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_v_cross_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_hc
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_vc
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_hx
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_vx
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_h_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_v_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_h_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_v_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_source_power_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_noise_source_power_h_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_source_power_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_noise_source_power_v_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • power_measure_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_power_measurement_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • power_measure_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_power_measurement_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • coupler_forward_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_coupler_forward_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • coupler_forward_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_coupler_forward_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • zdr_correction
      ()
      float32
      ...

      standard_name :

      calibrated_radar_zdr_correction

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • ldr_correction_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_ldr_correction_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • ldr_correction_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_ldr_correction_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • system_phidp
      ()
      float32
      ...

      standard_name :

      calibrated_radar_system_phidp

      units :

      degrees

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • test_power_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_test_power_h_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • test_power_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_test_power_v_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_h_co_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_v_co_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_h_cross_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_v_cross_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 64B
  Dimensions:                            ()
  Data variables: (12/16)
      roll_correction                    float32 4B ...
      latitude_correction                float32 4B ...
      heading_correction                 float32 4B ...
      vertical_velocity_correction       float32 4B ...
      eastward_ground_speed_correction   float32 4B ...
      rotation_correction                float32 4B ...
      ...                                 ...
      northward_ground_speed_correction  float32 4B ...
      azimuth_correction                 float32 4B ...
      range_correction                   float32 4B ...
      drift_correction                   float32 4B ...
      pressure_altitude_correction       float32 4B ...
      radar_altitude_correction          float32 4B ...

  georeferencing_correction

  • Groups: (0)
  • Dimensions:
  • Coordinates: (0)
  • Data variables: (16)
    • roll_correction
      ()
      float32
      ...

      standard_name :

      platform_roll_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • latitude_correction
      ()
      float32
      ...

      standard_name :

      latitude_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • heading_correction
      ()
      float32
      ...

      standard_name :

      platform_heading_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • vertical_velocity_correction
      ()
      float32
      ...

      standard_name :

      platform_vertical_velocity_correction

      units :

      meters per second

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • eastward_ground_speed_correction
      ()
      float32
      ...

      standard_name :

      platform_eastward_velocity_correction

      units :

      meters per second

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • rotation_correction
      ()
      float32
      ...

      standard_name :

      beam_rotation_angle_relative_to_platform_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • pitch_correction
      ()
      float32
      ...

      standard_name :

      platform_pitch_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • tilt_correction
      ()
      float32
      ...

      standard_name :

      beam_tilt_angle_relative_to_platform_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • longitude_correction
      ()
      float32
      ...

      standard_name :

      longitude_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • elevation_correction
      ()
      float32
      ...

      standard_name :

      beam_elevation_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • northward_ground_speed_correction
      ()
      float32
      ...

      standard_name :

      platform_northward_velocity_correction

      units :

      meters per second

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • azimuth_correction
      ()
      float32
      ...

      standard_name :

      azimuth_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • range_correction
      ()
      float32
      ...

      standard_name :

      range_to_center_of_measurement_volume_correction

      units :

      meters

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • drift_correction
      ()
      float32
      ...

      standard_name :

      platform_drift_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • pressure_altitude_correction
      ()
      float32
      ...

      standard_name :

      pressure_altitude_correction

      units :

      meters

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • radar_altitude_correction
      ()
      float32
      ...

      standard_name :

      altitude_correction

      units :

      meters

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_0

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:15:34 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000',
             '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000',
             '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_1

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:16:21 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000',
             '2008-06-04T00:16:21.000000000', ..., '2008-06-04T00:16:20.000000000',
             '2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 482, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 482B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_2

  • Groups: (0)
  • Dimensions:
    • azimuth: 482
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:07 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:07.000000000', '2008-06-04T00:17:08.000000000',
             '2008-06-04T00:17:08.000000000', ..., '2008-06-04T00:17:07.000000000',
             '2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_3

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:54 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000',
             '2008-06-04T00:17:55.000000000', ..., '2008-06-04T00:17:54.000000000',
             '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 481, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 481B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_4

  • Groups: (0)
  • Dimensions:
    • azimuth: 481
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:18:41 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000',
             '2008-06-04T00:18:41.000000000', ..., '2008-06-04T00:18:41.000000000',
             '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [481 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [481 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [481 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [481 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [481 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [481 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [481 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 482, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 482B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_5

  • Groups: (0)
  • Dimensions:
    • azimuth: 482
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:19:28 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000',
             '2008-06-04T00:19:28.000000000', ..., '2008-06-04T00:19:28.000000000',
             '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 482, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 482B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_6

  • Groups: (0)
  • Dimensions:
    • azimuth: 482
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:20:15 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000',
             '2008-06-04T00:20:15.000000000', ..., '2008-06-04T00:20:15.000000000',
             '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 484, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 484B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_7

  • Groups: (0)
  • Dimensions:
    • azimuth: 484
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:02 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000',
             '2008-06-04T00:21:02.000000000', ..., '2008-06-04T00:21:02.000000000',
             '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [484 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [484 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [484 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [484 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [484 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [484 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [484 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 4MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB ...
      latitude                   float64 8B ...
      longitude                  float64 8B ...
      altitude                   float64 8B ...
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_8

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (7)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:49 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000',
             '2008-06-04T00:21:49.000000000', ..., '2008-06-04T00:21:49.000000000',
             '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • latitude
      ()
      float64
      ...

      standard_name :

      latitude

      units :

      degrees_north

      [1 values with dtype=float64]

    • longitude
      ()
      float64
      ...

      standard_name :

      longitude

      units :

      degrees_east

      [1 values with dtype=float64]

    • altitude
      ()
      float64
      ...

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      [1 values with dtype=float64]

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

• Dimensions:
  • sweep: 9
• Coordinates: (0)
• Data variables: (12)
  • volume_number
    ()
    int32
    ...

    standard_name :

    data_volume_index_number

    [1 values with dtype=int32]

  • platform_type
    ()
    |S32
    ...

    standard_name :

    platform_type

    options :

    fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat

    [1 values with dtype=|S32]

  • primary_axis
    ()
    |S32
    ...

    standard_name :

    primary_axis_of_rotation

    options :

    axis_z, axis_y, axis_x

    [1 values with dtype=|S32]

  • status_str
    ()
    |S1
    ...

    standard_name :

    status_xml

    [1 values with dtype=|S1]

  • instrument_type
    ()
    |S32
    ...

    standard_name :

    type_of_instrument

    options :

    radar, lidar

    meta_group :

    instrument_parameters

    [1 values with dtype=|S32]

  • time_coverage_start
    ()
    |S32
    ...

    standard_name :

    data_volume_start_time_utc

    comment :

    ray times are relative to start time in secs

    [1 values with dtype=|S32]

  • time_coverage_end
    ()
    |S32
    ...

    standard_name :

    data_volume_end_time_utc

    [1 values with dtype=|S32]

  • latitude
    ()
    float64
    ...

    standard_name :

    latitude

    units :

    degrees_north

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    standard_name :

    longitude

    units :

    degrees_east

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    standard_name :

    altitude

    units :

    meters

    positive :

    up

    [1 values with dtype=float64]

  • sweep_group_name
    (sweep)
    <U7
    'sweep_0' 'sweep_1' ... 'sweep_8'

    array(['sweep_0', 'sweep_1', 'sweep_2', 'sweep_3', 'sweep_4', 'sweep_5',
           'sweep_6', 'sweep_7', 'sweep_8'], dtype='<U7')

  • sweep_fixed_angle
    (sweep)
    float32
    ...

    standard_name :

    beam_target_fixed_angle

    units :

    degrees

    [9 values with dtype=float32]

• Attributes: (13)

  Conventions :

  CF/Radial instrument_parameters radar_parameters radar_calibration geometry_correction

  version :

  1.2

  title :

  TIMREX

  institution :

  references :

  source :

  history :

  comment :

  instrument_name :

  SPOLRVP8

  site_name :

  scan_name :

  scan_id :

  0

  platform_is_mobile :

  false

Add georeferencing

We can use the georeference function, or the accessor to add our georeference information!

Georeference Accessor

If you prefer the accessor (.xradar.georefence()), this is how you would add georeference information to your radar object.

radar = radar.xradar.georeference()
display(radar)

<xarray.DatasetView> Size: 477B
Dimensions:              (sweep: 9)
Dimensions without coordinates: sweep
Data variables:
    volume_number        int32 4B ...
    platform_type        |S32 32B ...
    primary_axis         |S32 32B ...
    status_str           |S1 1B ...
    instrument_type      |S32 32B ...
    time_coverage_start  |S32 32B ...
    time_coverage_end    |S32 32B ...
    latitude             float64 8B ...
    longitude            float64 8B ...
    altitude             float64 8B ...
    sweep_group_name     (sweep) <U7 252B 'sweep_0' 'sweep_1' ... 'sweep_8'
    sweep_fixed_angle    (sweep) float32 36B ...
Attributes: (12/13)
    Conventions:         CF/Radial instrument_parameters radar_parameters rad...
    version:             1.2
    title:               TIMREX
    institution:
    references:
    source:
    ...                  ...
    comment:
    instrument_name:     SPOLRVP8
    site_name:
    scan_name:
    scan_id:             0
    platform_is_mobile:  false

datatree.DataTree

• Groups: (12)
  <xarray.DatasetView> Size: 20B
  Dimensions:                   ()
  Data variables:
      radar_receiver_bandwidth  float32 4B ...
      radar_beam_width_h        float32 4B ...
      radar_antenna_gain_h      float32 4B ...
      radar_beam_width_v        float32 4B ...
      radar_antenna_gain_v      float32 4B ...

  radar_parameters

  • Groups: (0)
  • Dimensions:
  • Coordinates: (0)
  • Data variables: (5)
    • radar_receiver_bandwidth
      ()
      float32
      ...

      standard_name :

      radar_receiver_bandwidth

      units :

      s-1

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_beam_width_h
      ()
      float32
      ...

      standard_name :

      half_power_radar_beam_width_h_channel

      units :

      degrees

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_antenna_gain_h
      ()
      float32
      ...

      standard_name :

      nominal_radar_antenna_gain_h_channel

      units :

      dB

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_beam_width_v
      ()
      float32
      ...

      standard_name :

      half_power_radar_beam_width_v_channel

      units :

      degrees

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

    • radar_antenna_gain_v
      ()
      float32
      ...

      standard_name :

      nominal_radar_antenna_gain_v_channel

      units :

      dB

      meta_group :

      radar_parameters

      [1 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 212B
  Dimensions:                   ()
  Data variables: (12/45)
      time                      |S32 32B ...
      pulse_width               timedelta64[ns] 8B ...
      xmit_power_h              float32 4B ...
      xmit_power_v              float32 4B ...
      two_way_waveguide_loss_h  float32 4B ...
      two_way_waveguide_loss_v  float32 4B ...
      ...                        ...
      test_power_h              float32 4B ...
      test_power_v              float32 4B ...
      receiver_slope_hc         float32 4B ...
      receiver_slope_vc         float32 4B ...
      receiver_slope_hx         float32 4B ...
      receiver_slope_vx         float32 4B ...

  radar_calibration

  • Groups: (0)
  • Dimensions:
  • Coordinates: (0)
  • Data variables: (45)
    • time
      ()
      |S32
      ...

      standard_name :

      radar_calibration_time_utc

      meta_group :

      radar_calibration

      [1 values with dtype=|S32]

    • pulse_width
      ()
      timedelta64[ns]
      ...

      standard_name :

      radar_calibration_pulse_width

      meta_group :

      radar_calibration

      [1 values with dtype=timedelta64[ns]]

    • xmit_power_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_xmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • xmit_power_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_xmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_waveguide_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_waveguide_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_waveguide_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_waveguide_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_radome_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_radome_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • two_way_radome_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_two_way_radome_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_mismatch_loss
      ()
      float32
      ...

      standard_name :

      radar_calibration_receiver_mismatch_loss

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • radar_constant_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_constant_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • radar_constant_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_constant_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • antenna_gain_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_antenna_gain_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • antenna_gain_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_antenna_gain_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_h_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_v_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_h_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_noise_v_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_h_co_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_v_co_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_h_cross_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_gain_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_gain_v_cross_polar_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_hc
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_vc
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_hx
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • base_1km_vx
      ()
      float32
      ...

      standard_name :

      radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel

      units :

      dBZ

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_h_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_v_co_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_h_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • sun_power_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_sun_power_v_cross_polar_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_source_power_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_noise_source_power_h_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • noise_source_power_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_noise_source_power_v_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • power_measure_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_power_measurement_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • power_measure_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_power_measurement_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • coupler_forward_loss_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_coupler_forward_loss_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • coupler_forward_loss_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_coupler_forward_loss_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • zdr_correction
      ()
      float32
      ...

      standard_name :

      calibrated_radar_zdr_correction

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • ldr_correction_h
      ()
      float32
      ...

      standard_name :

      calibrated_radar_ldr_correction_h_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • ldr_correction_v
      ()
      float32
      ...

      standard_name :

      calibrated_radar_ldr_correction_v_channel

      units :

      dB

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • system_phidp
      ()
      float32
      ...

      standard_name :

      calibrated_radar_system_phidp

      units :

      degrees

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • test_power_h
      ()
      float32
      ...

      standard_name :

      radar_calibration_test_power_h_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • test_power_v
      ()
      float32
      ...

      standard_name :

      radar_calibration_test_power_v_channel

      units :

      dBm

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_hc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_h_co_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_vc
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_v_co_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_hx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_h_cross_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

    • receiver_slope_vx
      ()
      float32
      ...

      standard_name :

      calibrated_radar_receiver_slope_v_cross_polar_channel

      meta_group :

      radar_calibration

      [1 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 64B
  Dimensions:                            ()
  Data variables: (12/16)
      roll_correction                    float32 4B ...
      latitude_correction                float32 4B ...
      heading_correction                 float32 4B ...
      vertical_velocity_correction       float32 4B ...
      eastward_ground_speed_correction   float32 4B ...
      rotation_correction                float32 4B ...
      ...                                 ...
      northward_ground_speed_correction  float32 4B ...
      azimuth_correction                 float32 4B ...
      range_correction                   float32 4B ...
      drift_correction                   float32 4B ...
      pressure_altitude_correction       float32 4B ...
      radar_altitude_correction          float32 4B ...

  georeferencing_correction

  • Groups: (0)
  • Dimensions:
  • Coordinates: (0)
  • Data variables: (16)
    • roll_correction
      ()
      float32
      ...

      standard_name :

      platform_roll_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • latitude_correction
      ()
      float32
      ...

      standard_name :

      latitude_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • heading_correction
      ()
      float32
      ...

      standard_name :

      platform_heading_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • vertical_velocity_correction
      ()
      float32
      ...

      standard_name :

      platform_vertical_velocity_correction

      units :

      meters per second

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • eastward_ground_speed_correction
      ()
      float32
      ...

      standard_name :

      platform_eastward_velocity_correction

      units :

      meters per second

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • rotation_correction
      ()
      float32
      ...

      standard_name :

      beam_rotation_angle_relative_to_platform_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • pitch_correction
      ()
      float32
      ...

      standard_name :

      platform_pitch_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • tilt_correction
      ()
      float32
      ...

      standard_name :

      beam_tilt_angle_relative_to_platform_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • longitude_correction
      ()
      float32
      ...

      standard_name :

      longitude_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • elevation_correction
      ()
      float32
      ...

      standard_name :

      beam_elevation_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • northward_ground_speed_correction
      ()
      float32
      ...

      standard_name :

      platform_northward_velocity_correction

      units :

      meters per second

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • azimuth_correction
      ()
      float32
      ...

      standard_name :

      azimuth_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • range_correction
      ()
      float32
      ...

      standard_name :

      range_to_center_of_measurement_volume_correction

      units :

      meters

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • drift_correction
      ()
      float32
      ...

      standard_name :

      platform_drift_angle_correction

      units :

      degrees

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • pressure_altitude_correction
      ()
      float32
      ...

      standard_name :

      pressure_altitude_correction

      units :

      meters

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

    • radar_altitude_correction
      ()
      float32
      ...

      standard_name :

      altitude_correction

      units :

      meters

      meta_group :

      geometry_correction

      [1 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.955e+03
      y                          (azimuth, range) float64 4MB 150.0 ... 1.493e+05
      z                          (azimuth, range) float64 4MB 46.35 ... 2.718e+03
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_0

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:15:34 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000',
             '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000',
             '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      0.5164 0.5219 ... 0.5219 0.5219

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([0.5164, 0.5219, 0.5164, ..., 0.5219, 0.5219, 0.5219], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.953e+03 -1.955e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.96334724e+00,  3.92669386e+00,  5.89004023e+00, ...,
               1.95105571e+03,  1.95301791e+03,  1.95497990e+03],
             [ 3.92636171e+00,  7.85272217e+00,  1.17790818e+01, ...,
               3.90178739e+03,  3.90571106e+03,  3.90963513e+03],
             ...,
             [-5.88867205e+00, -1.17773422e+01, -1.76660117e+01, ...,
              -5.85180603e+03, -5.85769125e+03, -5.86357585e+03],
             [-3.92638074e+00, -7.85276021e+00, -1.17791392e+01, ...,
              -3.90179964e+03, -3.90572372e+03, -3.90964739e+03],
             [-1.96334557e+00, -3.92669050e+00, -5.89003520e+00, ...,
              -1.95105404e+03, -1.95301624e+03, -1.95497823e+03]])

    • y
      (azimuth, range)
      float64
      150.0 300.0 ... 1.492e+05 1.493e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   149.99309379,    299.98613978,    449.97915313, ...,
              149054.31688405, 149204.20687937, 149354.11235657],
             [   149.98010903,    299.96016976,    449.94021259, ...,
              149041.15869507, 149191.05096627, 149340.9274796 ],
             [   149.94169609,    299.8833444 ,    449.82496008, ...,
              149003.24087312, 149153.07950607, 149302.93361559],
             ...,
             [   149.87731373,    299.75457918,    449.63182676, ...,
              148939.00694148, 149088.79647758, 149238.57026661],
             [   149.94155856,    299.88306882,    449.8245612 , ...,
              149002.8495664 , 149152.7033097 , 149302.54129919],
             [   149.98010903,    299.96016976,    449.94021259, ...,
              149041.15869507, 149191.05096627, 149340.9274796 ]])

    • z
      (azimuth, range)
      float64
      46.35 47.71 ... 2.714e+03 2.718e+03

      standard_name :

      height_above_ground

      units :

      meters

      array([[  46.35323889,   47.70912281,   49.06765379, ..., 2696.07241209,
              2700.05547636, 2704.04118986],
             [  46.36763734,   47.73791971,   49.11084902, ..., 2710.37994942,
              2714.37752879, 2718.37751331],
             [  46.35323889,   47.70912281,   49.06765379, ..., 2696.07241209,
              2700.05547636, 2704.04118986],
             ...,
             [  46.36763734,   47.73791971,   49.11084902, ..., 2710.37994942,
              2714.37752879, 2718.37751331],
             [  46.36763734,   47.73791971,   49.11084902, ..., 2710.37994942,
              2714.37752879, 2718.37751331],
             [  46.36763734,   47.73791971,   49.11084902, ..., 2710.37994942,
              2714.37752879, 2718.37751331]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 1.104 1.104 ... 1.104 1.104
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.954e+03
      y                          (azimuth, range) float64 4MB 150.0 ... 1.493e+05
      z                          (azimuth, range) float64 4MB 47.89 ... 4.236e+03
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_1

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:16:21 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000',
             '2008-06-04T00:16:21.000000000', ..., '2008-06-04T00:16:20.000000000',
             '2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      1.104 1.104 1.104 ... 1.104 1.104

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([1.1041, 1.1041, 1.1041, ..., 1.1041, 1.1041, 1.1041], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.952e+03 -1.954e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.96306387e+00,  3.92612641e+00,  5.88918781e+00, ...,
               1.95042694e+03,  1.95238803e+03,  1.95434932e+03],
             [ 3.92579142e+00,  7.85158016e+00,  1.17773666e+01, ...,
               3.90051971e+03,  3.90444155e+03,  3.90836380e+03],
             ...,
             [-5.88782214e+00, -1.17756403e+01, -1.76634550e+01, ...,
              -5.84992014e+03, -5.85580204e+03, -5.86168455e+03],
             [-3.92581405e+00, -7.85162542e+00, -1.17774345e+01, ...,
              -3.90054219e+03, -3.90446406e+03, -3.90838632e+03],
             [-1.96306220e+00, -3.92612306e+00, -5.88918278e+00, ...,
              -1.95042527e+03, -1.95238636e+03, -1.95434765e+03]])

    • y
      (azimuth, range)
      float64
      150.0 299.9 ... 1.491e+05 1.493e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   149.97130773,    299.94251338,    449.91363211, ...,
              149005.88929644, 149155.70977608, 149305.54568286],
             [   149.95846241,    299.91682275,    449.87509617, ...,
              148993.12666271, 149142.93430994, 149292.75738299],
             [   149.9199175 ,    299.83973295,    449.75946151, ...,
              148954.82988005, 149104.59902114, 149254.38358408],
             ...,
             [   149.85568194,    299.71126188,    449.56675497, ...,
              148891.00782993, 149040.71280007, 149190.43318544],
             [   149.9199175 ,    299.83973295,    449.75946151, ...,
              148954.82988005, 149104.59902114, 149254.38358408],
             [   149.95846241,    299.91682275,    449.87509617, ...,
              148993.12666271, 149142.93430994, 149292.75738299]])

    • z
      (azimuth, range)
      float64
      47.89 50.79 ... 4.23e+03 4.236e+03

      standard_name :

      height_above_ground

      units :

      meters

      array([[  47.89167301,   50.78599028,   53.68295432, ..., 4224.66207534,
              4230.18224085, 4235.7049314 ],
             [  47.89167301,   50.78599028,   53.68295432, ..., 4224.66207534,
              4230.18224085, 4235.7049314 ],
             [  47.89167301,   50.78599028,   53.68295432, ..., 4224.66207534,
              4230.18224085, 4235.7049314 ],
             ...,
             [  47.89167301,   50.78599028,   53.68295432, ..., 4224.66207534,
              4230.18224085, 4235.7049314 ],
             [  47.89167301,   50.78599028,   53.68295432, ..., 4224.66207534,
              4230.18224085, 4235.7049314 ],
             [  47.89167301,   50.78599028,   53.68295432, ..., 4224.66207534,
              4230.18224085, 4235.7049314 ]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 482, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 1.796 1.796 ... 1.796 1.796
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.953e+03
      y                          (azimuth, range) float64 4MB 149.9 ... 1.492e+05
      z                          (azimuth, range) float64 4MB 49.7 ... 6.039e+03
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 482B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_2

  • Groups: (0)
  • Dimensions:
    • azimuth: 482
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:07 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:07.000000000', '2008-06-04T00:17:08.000000000',
             '2008-06-04T00:17:08.000000000', ..., '2008-06-04T00:17:07.000000000',
             '2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      1.796 1.796 1.796 ... 1.796 1.796

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([1.7963, 1.7963, 1.7963, ..., 1.7963, 1.7963, 1.7963], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.951e+03 -1.953e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.96246307e+00,  3.92492396e+00,  5.88738288e+00, ...,
               1.94941777e+03,  1.95137762e+03,  1.95333726e+03],
             [ 3.92458991e+00,  7.84917547e+00,  1.17737571e+01, ...,
               3.89850154e+03,  3.90242091e+03,  3.90633986e+03],
             ...,
             [-5.88602014e+00, -1.17720338e+01, -1.76580415e+01, ...,
              -5.84689334e+03, -5.85277152e+03, -5.85864909e+03],
             [-3.92461253e+00, -7.84922071e+00, -1.17738249e+01, ...,
              -3.89852401e+03, -3.90244340e+03, -3.90636237e+03],
             [-1.96246139e+00, -3.92492061e+00, -5.88737785e+00, ...,
              -1.94941610e+03, -1.95137595e+03, -1.95333559e+03]])

    • y
      (azimuth, range)
      float64
      149.9 299.9 ... 1.491e+05 1.492e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   149.92540812,    299.85065028,    449.77574165, ...,
              148928.79220372, 149078.51806541, 149228.22806334],
             [   149.91256673,    299.82496751,    449.73721751, ...,
              148916.03617349, 149065.74921088, 149215.44638587],
             [   149.87403362,    299.74790133,    449.6216183 , ...,
              148877.75920597, 149027.43376153, 149177.09245877],
             ...,
             [   149.80981772,    299.6194696 ,    449.42897081, ...,
              148813.97017799, 148963.58060313, 149113.17517673],
             [   149.87403362,    299.74790133,    449.6216183 , ...,
              148877.75920597, 149027.43376153, 149177.09245877],
             [   149.91256673,    299.82496751,    449.73721751, ...,
              148916.03617349, 149065.74921088, 149215.44638587]])

    • z
      (azimuth, range)
      float64
      49.7 54.41 ... 6.032e+03 6.039e+03

      standard_name :

      height_above_ground

      units :

      meters

      array([[  49.70325596,   54.40915456,   59.11769854, ..., 6024.30075687,
              6031.63024712, 6038.96177118],
             [  49.70325596,   54.40915456,   59.11769854, ..., 6024.30075687,
              6031.63024712, 6038.96177118],
             [  49.70325596,   54.40915456,   59.11769854, ..., 6024.30075687,
              6031.63024712, 6038.96177118],
             ...,
             [  49.70325596,   54.40915456,   59.11769854, ..., 6024.30075687,
              6031.63024712, 6038.96177118],
             [  49.70325596,   54.40915456,   59.11769854, ..., 6024.30075687,
              6031.63024712, 6038.96177118],
             [  49.70325596,   54.40915456,   59.11769854, ..., 6024.30075687,
              6031.63024712, 6038.96177118]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 2.598 2.598 ... 2.598 2.598
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.952e+03
      y                          (azimuth, range) float64 4MB 149.8 ... 1.491e+05
      z                          (azimuth, range) float64 4MB 51.8 ... 8.127e+03
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_3

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:54 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000',
             '2008-06-04T00:17:55.000000000', ..., '2008-06-04T00:17:54.000000000',
             '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      2.598 2.598 2.598 ... 2.598 2.598

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([2.5983, 2.5983, 2.5983, ..., 2.5983, 2.5983, 2.5983], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.95e+03 -1.952e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.96140901e+00,  3.92281487e+00,  5.88421800e+00, ...,
               1.94789395e+03,  1.94985161e+03,  1.95180928e+03],
             [ 3.92248197e+00,  7.84495765e+00,  1.17674279e+01, ...,
               3.89545417e+03,  3.89936916e+03,  3.90328415e+03],
             ...,
             [-5.88285869e+00, -1.17657080e+01, -1.76485490e+01, ...,
              -5.84232295e+03, -5.84819458e+03, -5.85406620e+03],
             [-3.92250457e+00, -7.84500287e+00, -1.17674957e+01, ...,
              -3.89547662e+03, -3.89939164e+03, -3.90330665e+03],
             [-1.96140733e+00, -3.92281152e+00, -5.88421297e+00, ...,
              -1.94789228e+03, -1.94984995e+03, -1.95180761e+03]])

    • y
      (azimuth, range)
      float64
      149.8 299.7 ... 1.489e+05 1.491e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   149.84488149,    299.68952314,    449.53395538, ...,
              148812.37772163, 148961.93663068, 149111.49521896],
             [   149.832047  ,    299.66385417,    449.49545195, ...,
              148799.63166253, 148949.17776157, 149098.72353988],
             [   149.79353458,    299.5868294 ,    449.37991488, ...,
              148761.3846153 , 148910.89227542, 149060.3996149 ],
             ...,
             [   149.72935317,    299.45846669,    449.18737095, ...,
              148697.64544985, 148847.08905106, 148996.53233176],
             [   149.79353458,    299.5868294 ,    449.37991488, ...,
              148761.3846153 , 148910.89227542, 149060.3996149 ],
             [   149.832047  ,    299.66385417,    449.49545195, ...,
              148799.63166253, 148949.17776157, 149098.72353988]])

    • z
      (azimuth, range)
      float64
      51.8 58.61 ... 8.117e+03 8.127e+03

      standard_name :

      height_above_ground

      units :

      meters

      array([[  51.80132468,   58.60528917,   65.41189619, ..., 8108.0614744 ,
              8117.48532363, 8126.91120206],
             [  51.80132468,   58.60528917,   65.41189619, ..., 8108.0614744 ,
              8117.48532363, 8126.91120206],
             [  51.80132468,   58.60528917,   65.41189619, ..., 8108.0614744 ,
              8117.48532363, 8126.91120206],
             ...,
             [  51.80132468,   58.60528917,   65.41189619, ..., 8108.0614744 ,
              8117.48532363, 8126.91120206],
             [  51.80132468,   58.60528917,   65.41189619, ..., 8108.0614744 ,
              8117.48532363, 8126.91120206],
             [  51.80132468,   58.60528917,   65.41189619, ..., 8108.0614744 ,
              8117.48532363, 8126.91120206]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 481, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 3.598 3.598 ... 3.598 3.598
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.949e+03
      y                          (azimuth, range) float64 4MB 149.7 ... 1.489e+05
      z                          (azimuth, range) float64 4MB 54.41 ... 1.073e+04
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 481B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_4

  • Groups: (0)
  • Dimensions:
    • azimuth: 481
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:18:41 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000',
             '2008-06-04T00:18:41.000000000', ..., '2008-06-04T00:18:41.000000000',
             '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      3.598 3.598 3.598 ... 3.598 3.598

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([3.5981, 3.5981, 3.5981, ..., 3.5981, 3.5981, 3.5981], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.947e+03 -1.949e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.95955650e+00,  3.91910867e+00,  5.87865729e+00, ...,
               1.94546125e+03,  1.94741588e+03,  1.94937051e+03],
             [ 3.91877728e+00,  7.83754588e+00,  1.17563074e+01, ...,
               3.89058918e+03,  3.89449812e+03,  3.89840705e+03],
             ...,
             [-5.87730248e+00, -1.17545919e+01, -1.76318708e+01, ...,
              -5.83502655e+03, -5.84088909e+03, -5.84675162e+03],
             [-3.91879987e+00, -7.83759105e+00, -1.17563752e+01, ...,
              -3.89061161e+03, -3.89452057e+03, -3.89842951e+03],
             [-1.95955483e+00, -3.91910532e+00, -5.87865227e+00, ...,
              -1.94545959e+03, -1.94741422e+03, -1.94936885e+03]])

    • y
      (azimuth, range)
      float64
      149.7 299.4 ... 1.488e+05 1.489e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   149.70335683,    299.40638199,    449.10913641, ...,
              148626.52792575, 148775.85532241, 148925.18231593],
             [   149.69053446,    299.38073727,    449.07066937, ...,
              148613.79778503, 148763.11239151, 148912.4265949 ],
             [   149.65205842,    299.30378527,    448.95524148, ...,
              148575.59850403, 148724.8747311 , 148874.15055517],
             ...,
             [   149.58793763,    299.17554383,    448.76287951, ...,
              148511.93894158, 148661.15120889, 148810.36307338],
             [   149.65205842,    299.30378527,    448.95524148, ...,
              148575.59850403, 148724.8747311 , 148874.15055517],
             [   149.69053446,    299.38073727,    449.07066937, ...,
              148613.79778503, 148763.11239151, 148912.4265949 ]])

    • z
      (azimuth, range)
      float64
      54.41 63.83 ... 1.072e+04 1.073e+04

      standard_name :

      height_above_ground

      units :

      meters

      array([[   54.41493341,    63.83250164,    73.25270932, ...,
              10703.13337178, 10715.16484049, 10727.19784354],
             [   54.41493341,    63.83250164,    73.25270932, ...,
              10703.13337178, 10715.16484049, 10727.19784354],
             [   54.41493341,    63.83250164,    73.25270932, ...,
              10703.13337178, 10715.16484049, 10727.19784354],
             ...,
             [   54.41493341,    63.83250164,    73.25270932, ...,
              10703.13337178, 10715.16484049, 10727.19784354],
             [   54.41493341,    63.83250164,    73.25270932, ...,
              10703.13337178, 10715.16484049, 10727.19784354],
             [   54.41493341,    63.83250164,    73.25270932, ...,
              10703.13337178, 10715.16484049, 10727.19784354]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [481 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [481 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [481 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [481 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [481 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [481 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 482, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 4.708 4.708 ... 4.708 4.708
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.946e+03
      y                          (azimuth, range) float64 4MB 149.5 ... 1.487e+05
      z                          (azimuth, range) float64 4MB 57.31 ... 1.361e+04
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 482B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_5

  • Groups: (0)
  • Dimensions:
    • azimuth: 482
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:19:28 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000',
             '2008-06-04T00:19:28.000000000', ..., '2008-06-04T00:19:28.000000000',
             '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      4.708 4.708 4.708 ... 4.708 4.708

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([4.7077, 4.7077, 4.7077, ..., 4.7077, 4.7077, 4.7077], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.944e+03 -1.946e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.95680236e+00,  3.91359905e+00,  5.87039047e+00, ...,
               1.94207103e+03,  1.94402149e+03,  1.94597215e+03],
             [ 3.91326946e+00,  7.82652758e+00,  1.17397752e+01, ...,
               3.88380932e+03,  3.88770991e+03,  3.89161089e+03],
             ...,
             [-5.86904196e+00, -1.17380669e+01, -1.76070761e+01, ...,
              -5.82485825e+03, -5.83070827e+03, -5.83655888e+03],
             [-3.91329202e+00, -7.82657269e+00, -1.17398428e+01, ...,
              -3.88383171e+03, -3.88773232e+03, -3.89163332e+03],
             [-1.95680069e+00, -3.91359571e+00, -5.87038545e+00, ...,
              -1.94206937e+03, -1.94401983e+03, -1.94597048e+03]])

    • y
      (azimuth, range)
      float64
      149.5 299.0 ... 1.485e+05 1.487e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   149.49294956,    298.985466  ,    448.47757974, ...,
              148367.52675262, 148516.53516221, 148665.55867095],
             [   149.48014521,    298.95985733,    448.43916679, ...,
              148354.81879583, 148503.81444257, 148652.82518717],
             [   149.44172324,    298.88301351,    448.32390123, ...,
              148316.68608207, 148465.64343138, 148614.61587467],
             ...,
             [   149.37769257,    298.75495236,    448.13180977, ...,
              148253.13745474, 148402.03098092, 148550.93959461],
             [   149.44172324,    298.88301351,    448.32390123, ...,
              148316.68608207, 148465.64343138, 148614.61587467],
             [   149.48014521,    298.95985733,    448.43916679, ...,
              148354.81879583, 148503.81444257, 148652.82518717]])

    • z
      (azimuth, range)
      float64
      57.31 69.63 ... 1.359e+04 1.361e+04

      standard_name :

      height_above_ground

      units :

      meters

      array([[   57.31218274,    69.6269929 ,    81.9444351 , ...,
              13578.91014047, 13593.83039544, 13608.75217509],
             [   57.31218274,    69.6269929 ,    81.9444351 , ...,
              13578.91014047, 13593.83039544, 13608.75217509],
             [   57.31218274,    69.6269929 ,    81.9444351 , ...,
              13578.91014047, 13593.83039544, 13608.75217509],
             ...,
             [   57.31218274,    69.6269929 ,    81.9444351 , ...,
              13578.91014047, 13593.83039544, 13608.75217509],
             [   57.31218274,    69.6269929 ,    81.9444351 , ...,
              13578.91014047, 13593.83039544, 13608.75217509],
             [   57.31218274,    69.6269929 ,    81.9444351 , ...,
              13578.91014047, 13593.83039544, 13608.75217509]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 482, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 6.471 6.471 ... 6.471 6.471
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.939e+03
      y                          (azimuth, range) float64 4MB 149.0 ... 1.481e+05
      z                          (azimuth, range) float64 4MB 61.91 ... 1.818e+04
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 482B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_6

  • Groups: (0)
  • Dimensions:
    • azimuth: 482
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:20:15 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000',
             '2008-06-04T00:20:15.000000000', ..., '2008-06-04T00:20:15.000000000',
             '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      6.471 6.471 6.471 ... 6.471 6.471

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([6.471, 6.471, 6.471, ..., 6.471, 6.471, 6.471], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.937e+03 -1.939e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.95091626e+00,  3.90182476e+00,  5.85272569e+00, ...,
               1.93519345e+03,  1.93713612e+03,  1.93907858e+03],
             [ 3.90149827e+00,  7.80298102e+00,  1.17044486e+01, ...,
               3.87005535e+03,  3.87394036e+03,  3.87782494e+03],
             ...,
             [-5.85138777e+00, -1.17027523e+01, -1.75540941e+01, ...,
              -5.80423032e+03, -5.81005698e+03, -5.81588299e+03],
             [-3.90152076e+00, -7.80302599e+00, -1.17045161e+01, ...,
              -3.87007766e+03, -3.87396269e+03, -3.87784729e+03],
             [-1.95091459e+00, -3.90182142e+00, -5.85272069e+00, ...,
              -1.93519180e+03, -1.93713447e+03, -1.93907692e+03]])

    • y
      (azimuth, range)
      float64
      149.0 298.1 ... 1.48e+05 1.481e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   149.04327181,    298.0859507 ,    447.12805183, ...,
              147842.1037142 , 147990.51702209, 148138.91402472],
             [   149.03050598,    298.06041908,    447.08975447, ...,
              147829.44076088, 147977.8413569 , 148126.22564904],
             [   148.99219959,    297.98380645,    446.97483576, ...,
              147791.44308885, 147939.80554038, 148088.15169223],
             ...,
             [   148.92836153,    297.85613058,    446.78332233, ...,
              147728.11951018, 147876.41839347, 148024.70098407],
             [   148.99219959,    297.98380645,    446.97483576, ...,
              147791.44308885, 147939.80554038, 148088.15169223],
             [   149.03050598,    298.06041908,    447.08975447, ...,
              147829.44076088, 147977.8413569 , 148126.22564904]])

    • z
      (azimuth, range)
      float64
      61.91 78.82 ... 1.816e+04 1.818e+04

      standard_name :

      height_above_ground

      units :

      meters

      array([[   61.90635496,    78.81532152,    95.7269072 , ...,
              18137.0466926 , 18156.54197306, 18176.04168235],
             [   61.90635496,    78.81532152,    95.7269072 , ...,
              18137.0466926 , 18156.54197306, 18176.04168235],
             [   61.90635496,    78.81532152,    95.7269072 , ...,
              18137.0466926 , 18156.54197306, 18176.04168235],
             ...,
             [   61.90635496,    78.81532152,    95.7269072 , ...,
              18137.0466926 , 18156.54197306, 18176.04168235],
             [   61.90635496,    78.81532152,    95.7269072 , ...,
              18137.0466926 , 18156.54197306, 18176.04168235],
             [   61.90635496,    78.81532152,    95.7269072 , ...,
              18137.0466926 , 18156.54197306, 18176.04168235]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [482 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 484, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 9.102 9.102 ... 9.102 9.102
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.925e+03
      y                          (azimuth, range) float64 4MB 148.1 ... 1.471e+05
      z                          (azimuth, range) float64 4MB 68.73 ... 2.496e+04
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 484B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_7

  • Groups: (0)
  • Dimensions:
    • azimuth: 484
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:02 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000',
             '2008-06-04T00:21:02.000000000', ..., '2008-06-04T00:21:02.000000000',
             '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      9.102 9.102 9.102 ... 9.102 9.102

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([9.1023, 9.1023, 9.1023, ..., 9.1023, 9.1023, 9.1023], dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.923e+03 -1.925e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.93869902e+00,  3.87738721e+00,  5.81606498e+00, ...,
               1.92154847e+03,  1.92347586e+03,  1.92540323e+03],
             [ 3.87706588e+00,  7.75411012e+00,  1.16311335e+01, ...,
               3.84276773e+03,  3.84662217e+03,  3.85047659e+03],
             ...,
             [-5.81474457e+00, -1.16294567e+01, -1.74441375e+01, ...,
              -5.76330490e+03, -5.76908571e+03, -5.77486649e+03],
             [-3.87708823e+00, -7.75415481e+00, -1.16312005e+01, ...,
              -3.84278988e+03, -3.84664434e+03, -3.85049878e+03],
             [-1.93869736e+00, -3.87738390e+00, -5.81606001e+00, ...,
              -1.92154683e+03, -1.92347422e+03, -1.92540159e+03]])

    • y
      (azimuth, range)
      float64
      148.1 296.2 ... 1.469e+05 1.471e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   148.1099169 ,    296.21900675,    444.3273    , ...,
              146799.67438485, 146946.91999516, 147094.164733  ],
             [   148.09723101,    296.19363504,    444.28924253, ...,
              146787.10071756, 146934.333716  , 147081.56584206],
             [   148.0591645 ,    296.11750224,    444.17504365, ...,
              146749.37096574, 146896.56611981, 147043.76040173],
             ...,
             [   147.99572621,    295.99062602,    443.98472984, ...,
              146686.49387933, 146833.62596532, 146980.75717952],
             [   148.0591645 ,    296.11750224,    444.17504365, ...,
              146749.37096574, 146896.56611981, 147043.76040173],
             [   148.09723101,    296.19363504,    444.28924253, ...,
              146787.10071756, 146934.333716  , 147081.56584206]])

    • z
      (azimuth, range)
      float64
      68.73 92.46 ... 2.493e+04 2.496e+04

      standard_name :

      height_above_ground

      units :

      meters

      array([[   68.73094649,    92.46447196,   116.20058772, ...,
              24903.61120664, 24929.89726155, 24956.18381046],
             [   68.73094649,    92.46447196,   116.20058772, ...,
              24903.61120664, 24929.89726155, 24956.18381046],
             [   68.73094649,    92.46447196,   116.20058772, ...,
              24903.61120664, 24929.89726155, 24956.18381046],
             ...,
             [   68.73094649,    92.46447196,   116.20058772, ...,
              24903.61120664, 24929.89726155, 24956.18381046],
             [   68.73094649,    92.46447196,   116.20058772, ...,
              24903.61120664, 24929.89726155, 24956.18381046],
             [   68.73094649,    92.46447196,   116.20058772, ...,
              24903.61120664, 24929.89726155, 24956.18381046]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [484 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [484 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [484 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [484 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [484 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [484 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

  • Attributes: (0)

  <xarray.DatasetView> Size: 15MB
  Dimensions:                    (azimuth: 483, range: 996)
  Coordinates:
      time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
    * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
      elevation                  (azimuth) float32 2kB 12.8 12.8 ... 12.79 12.8
      latitude                   float64 8B 22.53
      longitude                  float64 8B 120.4
      altitude                   float64 8B 45.0
      crs_wkt                    int64 8B 0
      x                          (azimuth, range) float64 4MB 0.0 ... -1.899e+03
      y                          (azimuth, range) float64 4MB 146.3 ... 1.451e+05
      z                          (azimuth, range) float64 4MB 78.23 ... 3.439e+04
  Data variables: (12/18)
      sweep_number               int32 4B ...
      sweep_mode                 <U20 80B 'azimuth_surveillance'
      prt_mode                   |S32 32B ...
      follow_mode                |S32 32B ...
      sweep_fixed_angle          float32 4B ...
      pulse_width                (azimuth) timedelta64[ns] 4kB ...
      ...                         ...
      r_calib_index              (azimuth) int8 483B ...
      measured_transmit_power_h  (azimuth) float32 2kB ...
      measured_transmit_power_v  (azimuth) float32 2kB ...
      scan_rate                  (azimuth) float32 2kB ...
      DBZ                        (azimuth, range) float32 2MB ...
      VR                         (azimuth, range) float32 2MB ...

  sweep_8

  • Groups: (0)
  • Dimensions:
    • azimuth: 483
    • range: 996
  • Coordinates: (11)
    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:49 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000',
             '2008-06-04T00:21:49.000000000', ..., '2008-06-04T00:21:49.000000000',
             '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000'],
            dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
             149250.     , 149400.     ], dtype=float32)

    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25], dtype=float32)

    • elevation
      (azimuth)
      float32
      12.8 12.8 12.8 ... 12.79 12.79 12.8

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      array([12.7993, 12.8048, 12.7993, ..., 12.7883, 12.7938, 12.7993],
            dtype=float32)

    • latitude
      ()
      float64
      22.53

      standard_name :

      latitude

      units :

      degrees_north

      array(22.526699)

    • longitude
      ()
      float64
      120.4

      standard_name :

      longitude

      units :

      degrees_east

      array(120.433502)

    • altitude
      ()
      float64
      45.0

      standard_name :

      altitude

      units :

      meters

      positive :

      up

      array(45.000002)

    • crs_wkt
      ()
      int64
      0

      crs_wkt :

      PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

      semi_major_axis :

      6378137.0

      semi_minor_axis :

      6356752.314245179

      inverse_flattening :

      298.257223563

      reference_ellipsoid_name :

      WGS 84

      longitude_of_prime_meridian :

      0.0

      prime_meridian_name :

      Greenwich

      geographic_crs_name :

      unknown

      horizontal_datum_name :

      World Geodetic System 1984

      projected_crs_name :

      unknown

      grid_mapping_name :

      azimuthal_equidistant

      latitude_of_projection_origin :

      22.52669906616211

      longitude_of_projection_origin :

      120.43350219726562

      false_easting :

      0.0

      false_northing :

      0.0

      array(0)

    • x
      (azimuth, range)
      float64
      0.0 0.0 ... -1.898e+03 -1.899e+03

      standard_name :

      east_west_distance_from_radar

      units :

      meters

      array([[ 0.00000000e+00,  0.00000000e+00,  0.00000000e+00, ...,
               0.00000000e+00,  0.00000000e+00,  0.00000000e+00],
             [ 1.91459269e+00,  3.82917040e+00,  5.74373353e+00, ...,
               1.89555916e+03,  1.89745835e+03,  1.89935772e+03],
             [ 3.82894084e+00,  7.65785174e+00,  1.14867331e+01, ...,
               3.79088244e+03,  3.79468091e+03,  3.79847894e+03],
             ...,
             [-5.74281803e+00, -1.14855912e+01, -1.72283201e+01, ...,
              -5.68575501e+03, -5.69145192e+03, -5.69714816e+03],
             [-3.82904639e+00, -7.65806286e+00, -1.14870494e+01, ...,
              -3.79099317e+03, -3.79479127e+03, -3.79858974e+03],
             [-1.91463280e+00, -3.82925063e+00, -5.74385369e+00, ...,
              -1.89560199e+03, -1.89750138e+03, -1.89940056e+03]])

    • y
      (azimuth, range)
      float64
      146.3 292.5 ... 1.45e+05 1.451e+05

      standard_name :

      north_south_distance_from_radar

      units :

      meters

      array([[   146.27146566,    292.54178756,    438.81098089, ...,
              144817.57590602, 144962.68338748, 145107.77409194],
             [   146.25574821,    292.5103523 ,    438.76384271, ...,
              144801.77681966, 144946.855889  , 145091.94924231],
             [   146.22134324,    292.44154311,    438.6606148 , ...,
              144767.95168684, 144913.00944474, 145058.0504314 ],
             ...,
             [   146.16506607,    292.32899019,    438.49178752, ...,
              144712.70939614, 144857.70590807, 145002.68565678],
             [   146.22453144,    292.44791998,    438.67016554, ...,
              144771.34601514, 144916.38870032, 145061.44566674],
             [   146.25893723,    292.51673081,    438.77339591, ...,
              144805.17200917, 144950.26706191, 145095.34533908]])

    • z
      (azimuth, range)
      float64
      78.23 111.5 ... 3.435e+04 3.439e+04

      standard_name :

      height_above_ground

      units :

      meters

      array([[   78.23174817,   111.46601164,   144.702796  , ...,
              34314.70653832, 34350.42542517, 34386.1466822 ],
             [   78.24579001,   111.49409522,   144.74491739, ...,
              34328.6075137 , 34364.33801399, 34400.0747749 ],
             [   78.23174817,   111.46601164,   144.702796  , ...,
              34314.70653832, 34350.42542517, 34386.1466822 ],
             ...,
             [   78.20366448,   111.40984448,   144.61854558, ...,
              34286.90062906, 34322.59239835, 34358.28653807],
             [   78.21770632,   111.43792806,   144.66067461, ...,
              34300.8055403 , 34336.50892311, 34372.21856677],
             [   78.23174817,   111.46601164,   144.702796  , ...,
              34314.70653832, 34350.42542517, 34386.1466822 ]])

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      transmitter_pulse_width

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • prt_ratio
      (azimuth)
      timedelta64[ns]
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      meta_group :

      instrument_parameters

      [483 values with dtype=timedelta64[ns]]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  • Attributes: (0)

• Dimensions:
  • sweep: 9
• Coordinates: (0)
• Data variables: (12)
  • volume_number
    ()
    int32
    ...

    standard_name :

    data_volume_index_number

    [1 values with dtype=int32]

  • platform_type
    ()
    |S32
    ...

    standard_name :

    platform_type

    options :

    fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat

    [1 values with dtype=|S32]

  • primary_axis
    ()
    |S32
    ...

    standard_name :

    primary_axis_of_rotation

    options :

    axis_z, axis_y, axis_x

    [1 values with dtype=|S32]

  • status_str
    ()
    |S1
    ...

    standard_name :

    status_xml

    [1 values with dtype=|S1]

  • instrument_type
    ()
    |S32
    ...

    standard_name :

    type_of_instrument

    options :

    radar, lidar

    meta_group :

    instrument_parameters

    [1 values with dtype=|S32]

  • time_coverage_start
    ()
    |S32
    ...

    standard_name :

    data_volume_start_time_utc

    comment :

    ray times are relative to start time in secs

    [1 values with dtype=|S32]

  • time_coverage_end
    ()
    |S32
    ...

    standard_name :

    data_volume_end_time_utc

    [1 values with dtype=|S32]

  • latitude
    ()
    float64
    ...

    standard_name :

    latitude

    units :

    degrees_north

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    standard_name :

    longitude

    units :

    degrees_east

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    standard_name :

    altitude

    units :

    meters

    positive :

    up

    [1 values with dtype=float64]

  • sweep_group_name
    (sweep)
    <U7
    'sweep_0' 'sweep_1' ... 'sweep_8'

    array(['sweep_0', 'sweep_1', 'sweep_2', 'sweep_3', 'sweep_4', 'sweep_5',
           'sweep_6', 'sweep_7', 'sweep_8'], dtype='<U7')

  • sweep_fixed_angle
    (sweep)
    float32
    ...

    standard_name :

    beam_target_fixed_angle

    units :

    degrees

    [9 values with dtype=float32]

• Attributes: (13)

  Conventions :

  CF/Radial instrument_parameters radar_parameters radar_calibration geometry_correction

  version :

  1.2

  title :

  TIMREX

  institution :

  references :

  source :

  history :

  comment :

  instrument_name :

  SPOLRVP8

  site_name :

  scan_name :

  scan_id :

  0

  platform_is_mobile :

  false

Please observe, that the additional coordinates x,