CfRadial1 to CfRadial2#

A data model transformation#

In this notebook we show how to transform the CfRadial1 Data model to a CfRadial2 representation.

We use some internal functions to show how xradar is working inside.

Within this notebook we reference to the CfRadial2.1 draft. As long as the FM301 WMO standard is not finalized we will rely on the drafts presented.

[1]:

import os

import xarray as xr
from open_radar_data import DATASETS

import xradar as xd

Download#

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

[2]:

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

Open CfRadial1 file using xr.open_dataset#

Making use of the xarray netcdf4 backend. We get back all data and metadata in one single CfRadial1 Dataset.

[3]:

ds = xr.open_dataset(filename, engine="netcdf4")
with xr.set_options(
    display_expand_data_vars=True, display_expand_attrs=True, display_max_rows=1000
):
    display(ds.load())

<xarray.Dataset> Size: 35MB
Dimensions:                           (sweep: 9, r_calib: 1, time: 4343,
                                       range: 996)
Coordinates:
  * time                              (time) datetime64[ns] 35kB 2008-06-04T0...
  * range                             (range) float32 4kB 150.0 ... 1.494e+05
Dimensions without coordinates: sweep, r_calib
Data variables:
    volume_number                     int32 4B 36
    platform_type                     |S32 32B b'fixed'
    primary_axis                      |S32 32B b'axis_z'
    status_xml                        |S1 1B b''
    instrument_type                   |S32 32B b'radar'
    radar_antenna_gain_h              float32 4B 45.15
    radar_antenna_gain_v              float32 4B 45.15
    radar_beam_width_h                float32 4B 0.92
    radar_beam_width_v                float32 4B 0.92
    radar_rx_bandwidth                float32 4B -9.999e+03
    time_coverage_start               |S32 32B b'2008-06-04T00:15:03Z'
    time_coverage_end                 |S32 32B b'2008-06-04T00:22:17Z'
    azimuth_correction                float32 4B 0.0
    elevation_correction              float32 4B 0.0
    range_correction                  float32 4B 0.0
    longitude_correction              float32 4B 0.0
    latitude_correction               float32 4B 0.0
    pressure_altitude_correction      float32 4B 0.0
    altitude_correction               float32 4B 0.0
    eastward_velocity_correction      float32 4B 0.0
    northward_velocity_correction     float32 4B 0.0
    vertical_velocity_correction      float32 4B 0.0
    heading_correction                float32 4B 0.0
    roll_correction                   float32 4B 0.0
    pitch_correction                  float32 4B 0.0
    drift_correction                  float32 4B 0.0
    rotation_correction               float32 4B 0.0
    tilt_correction                   float32 4B 0.0
    latitude                          float64 8B 22.53
    longitude                         float64 8B 120.4
    altitude                          float64 8B 45.0
    sweep_number                      (sweep) int32 36B 0 1 2 3 4 5 6 7 8
    sweep_mode                        (sweep) |S32 288B b'azimuth_surveillanc...
    polarization_mode                 (sweep) |S32 288B b'not_set' ... b'not_...
    prt_mode                          (sweep) |S32 288B b'not_set' ... b'not_...
    follow_mode                       (sweep) |S32 288B b'not_set' ... b'not_...
    fixed_angle                       (sweep) float32 36B 0.4999 1.099 ... 12.8
    target_scan_rate                  (sweep) float32 36B -9.999e+03 ... -9.9...
    sweep_start_ray_index             (sweep) int32 36B 0 483 966 ... 3376 3860
    sweep_end_ray_index               (sweep) int32 36B 482 965 ... 3859 4342
    r_calib_time                      (r_calib) |S32 32B b'2008-06-04T00:15:03Z'
    r_calib_pulse_width               (r_calib) timedelta64[ns] 8B 00:00:00
    r_calib_xmit_power_h              (r_calib) float32 4B 145.3
    r_calib_xmit_power_v              (r_calib) float32 4B 145.3
    r_calib_two_way_waveguide_loss_h  (r_calib) float32 4B -36.89
    r_calib_two_way_waveguide_loss_v  (r_calib) float32 4B -36.89
    r_calib_two_way_radome_loss_h     (r_calib) float32 4B -9.999e+03
    r_calib_two_way_radome_loss_v     (r_calib) float32 4B -9.999e+03
    r_calib_receiver_mismatch_loss    (r_calib) float32 4B -9.999e+03
    r_calib_radar_constant_h          (r_calib) float32 4B -70.72
    r_calib_radar_constant_v          (r_calib) float32 4B -70.72
    r_calib_antenna_gain_h            (r_calib) float32 4B -9.999e+03
    r_calib_antenna_gain_v            (r_calib) float32 4B -9.999e+03
    r_calib_noise_hc                  (r_calib) float32 4B -114.7
    r_calib_noise_vc                  (r_calib) float32 4B -114.7
    r_calib_noise_hx                  (r_calib) float32 4B -9.999e+03
    r_calib_noise_vx                  (r_calib) float32 4B -9.999e+03
    r_calib_receiver_gain_hc          (r_calib) float32 4B 36.89
    r_calib_receiver_gain_vc          (r_calib) float32 4B 36.89
    r_calib_receiver_gain_hx          (r_calib) float32 4B -9.999e+03
    r_calib_receiver_gain_vx          (r_calib) float32 4B -9.999e+03
    r_calib_base_dbz_1km_hc           (r_calib) float32 4B -9.999e+03
    r_calib_base_dbz_1km_vc           (r_calib) float32 4B -9.999e+03
    r_calib_base_dbz_1km_hx           (r_calib) float32 4B -9.999e+03
    r_calib_base_dbz_1km_vx           (r_calib) float32 4B -9.999e+03
    r_calib_sun_power_hc              (r_calib) float32 4B -9.999e+03
    r_calib_sun_power_vc              (r_calib) float32 4B -9.999e+03
    r_calib_sun_power_hx              (r_calib) float32 4B -9.999e+03
    r_calib_sun_power_vx              (r_calib) float32 4B -9.999e+03
    r_calib_noise_source_power_h      (r_calib) float32 4B -9.999e+03
    r_calib_noise_source_power_v      (r_calib) float32 4B -9.999e+03
    r_calib_power_measure_loss_h      (r_calib) float32 4B -9.999e+03
    r_calib_power_measure_loss_v      (r_calib) float32 4B -9.999e+03
    r_calib_coupler_forward_loss_h    (r_calib) float32 4B -9.999e+03
    r_calib_coupler_forward_loss_v    (r_calib) float32 4B -9.999e+03
    r_calib_zdr_correction            (r_calib) float32 4B -9.999e+03
    r_calib_ldr_correction_h          (r_calib) float32 4B -9.999e+03
    r_calib_ldr_correction_v          (r_calib) float32 4B -9.999e+03
    r_calib_system_phidp              (r_calib) float32 4B -9.999e+03
    r_calib_test_power_h              (r_calib) float32 4B -9.999e+03
    r_calib_test_power_v              (r_calib) float32 4B -9.999e+03
    r_calib_receiver_slope_hc         (r_calib) float32 4B -9.999e+03
    r_calib_receiver_slope_vc         (r_calib) float32 4B -9.999e+03
    r_calib_receiver_slope_hx         (r_calib) float32 4B -9.999e+03
    r_calib_receiver_slope_vx         (r_calib) float32 4B -9.999e+03
    azimuth                           (time) float32 17kB 121.5 122.2 ... 213.0
    elevation                         (time) float32 17kB 0.379 0.2362 ... 12.81
    pulse_width                       (time) timedelta64[ns] 35kB 00:00:00 .....
    prt                               (time) timedelta64[ns] 35kB -1 days +21...
    prt_ratio                         (time) timedelta64[ns] 35kB -1 days +21...
    nyquist_velocity                  (time) float32 17kB 26.92 26.92 ... 26.92
    unambiguous_range                 (time) float32 17kB 1.5e+05 ... 1.5e+05
    antenna_transition                (time) int8 4kB 0 0 0 0 0 0 ... 0 0 0 0 0
    n_samples                         (time) int32 17kB 192 192 192 ... 192 192
    r_calib_index                     (time) int8 4kB -1 -1 -1 -1 ... -1 -1 -1
    measured_transmit_power_h         (time) float32 17kB -9.999e+03 ... -9.9...
    measured_transmit_power_v         (time) float32 17kB -9.999e+03 ... -9.9...
    scan_rate                         (time) float32 17kB -3.277e+04 ... -3.2...
    DBZ                               (time, range) float32 17MB -3.07 ... nan
    VR                                (time, range) float32 17MB -25.24 ... nan
Attributes:
    Conventions:         CF/Radial instrument_parameters radar_parameters rad...
    version:             1.2
    title:               TIMREX
    institution:
    references:
    source:
    history:
    comment:
    instrument_name:     SPOLRVP8
    site_name:
    scan_name:
    scan_id:             0
    platform_is_mobile:  false
    n_gates_vary:        false

xarray.Dataset

Dimensions:
- sweep: 9
- r_calib: 1
- time: 4343
- range: 996
Coordinates: (2)
- time
  (time)
  datetime64[ns]
  2008-06-04T00:15:03 ... 2008-06-...
  standard_name :
  time
  long_name :
  time in seconds since volume start
  comment :
  times are relative to the volume start_time
```
array(['2008-06-04T00:15:03.000000000', '2008-06-04T00:15:03.000000000',
       '2008-06-04T00:15:03.000000000', ..., '2008-06-04T00:22:16.000000000',
       '2008-06-04T00:22:17.000000000', '2008-06-04T00:22:17.000000000'],
      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)
```
Data variables: (100)
- volume_number
  ()
  int32
  36
  standard_name :
  data_volume_index_number
```
array(36, dtype=int32)
```
- platform_type
  ()
  |S32
  b'fixed'
  standard_name :
  platform_type
  options :
  fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat
```
array(b'fixed', dtype='|S32')
```
- primary_axis
  ()
  |S32
  b'axis_z'
  standard_name :
  primary_axis_of_rotation
  options :
  axis_z, axis_y, axis_x
```
array(b'axis_z', dtype='|S32')
```
- status_xml
  ()
  |S1
  b''
  standard_name :
  status_xml
```
array(b'', dtype='|S1')
```
- instrument_type
  ()
  |S32
  b'radar'
  standard_name :
  type_of_instrument
  options :
  radar, lidar
  meta_group :
  instrument_parameters
```
array(b'radar', dtype='|S32')
```
- radar_antenna_gain_h
  ()
  float32
  45.15
  standard_name :
  nominal_radar_antenna_gain_h_channel
  units :
  dB
  meta_group :
  radar_parameters
```
array(45.15, dtype=float32)
```
- radar_antenna_gain_v
  ()
  float32
  45.15
  standard_name :
  nominal_radar_antenna_gain_v_channel
  units :
  dB
  meta_group :
  radar_parameters
```
array(45.15, dtype=float32)
```
- radar_beam_width_h
  ()
  float32
  0.92
  standard_name :
  half_power_radar_beam_width_h_channel
  units :
  degrees
  meta_group :
  radar_parameters
```
array(0.92, dtype=float32)
```
- radar_beam_width_v
  ()
  float32
  0.92
  standard_name :
  half_power_radar_beam_width_v_channel
  units :
  degrees
  meta_group :
  radar_parameters
```
array(0.92, dtype=float32)
```
- radar_rx_bandwidth
  ()
  float32
  -9.999e+03
  standard_name :
  radar_receiver_bandwidth
  units :
  s-1
  meta_group :
  radar_parameters
```
array(-9999., dtype=float32)
```
- time_coverage_start
  ()
  |S32
  b'2008-06-04T00:15:03Z'
  standard_name :
  data_volume_start_time_utc
  comment :
  ray times are relative to start time in secs
```
array(b'2008-06-04T00:15:03Z', dtype='|S32')
```
- time_coverage_end
  ()
  |S32
  b'2008-06-04T00:22:17Z'
  standard_name :
  data_volume_end_time_utc
```
array(b'2008-06-04T00:22:17Z', dtype='|S32')
```
- azimuth_correction
  ()
  float32
  0.0
  standard_name :
  azimuth_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- elevation_correction
  ()
  float32
  0.0
  standard_name :
  beam_elevation_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- range_correction
  ()
  float32
  0.0
  standard_name :
  range_to_center_of_measurement_volume_correction
  units :
  meters
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- longitude_correction
  ()
  float32
  0.0
  standard_name :
  longitude_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- latitude_correction
  ()
  float32
  0.0
  standard_name :
  latitude_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- pressure_altitude_correction
  ()
  float32
  0.0
  standard_name :
  pressure_altitude_correction
  units :
  meters
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- altitude_correction
  ()
  float32
  0.0
  standard_name :
  altitude_correction
  units :
  meters
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- eastward_velocity_correction
  ()
  float32
  0.0
  standard_name :
  platform_eastward_velocity_correction
  units :
  meters per second
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- northward_velocity_correction
  ()
  float32
  0.0
  standard_name :
  platform_northward_velocity_correction
  units :
  meters per second
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- vertical_velocity_correction
  ()
  float32
  0.0
  standard_name :
  platform_vertical_velocity_correction
  units :
  meters per second
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- heading_correction
  ()
  float32
  0.0
  standard_name :
  platform_heading_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- roll_correction
  ()
  float32
  0.0
  standard_name :
  platform_roll_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- pitch_correction
  ()
  float32
  0.0
  standard_name :
  platform_pitch_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- drift_correction
  ()
  float32
  0.0
  standard_name :
  platform_drift_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- rotation_correction
  ()
  float32
  0.0
  standard_name :
  beam_rotation_angle_relative_to_platform_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- tilt_correction
  ()
  float32
  0.0
  standard_name :
  beam_tilt_angle_relative_to_platform_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- latitude
  ()
  float64
  22.53
  standard_name :
  latitude
  units :
  degrees_north
```
array(22.52669907)
```
- longitude
  ()
  float64
  120.4
  standard_name :
  longitude
  units :
  degrees_east
```
array(120.4335022)
```
- altitude
  ()
  float64
  45.0
  standard_name :
  altitude
  units :
  meters
  positive :
  up
```
array(45.00000179)
```
- sweep_number
  (sweep)
  int32
  0 1 2 3 4 5 6 7 8
  standard_name :
  sweep_index_number_0_based
```
array([0, 1, 2, 3, 4, 5, 6, 7, 8], dtype=int32)
```
- sweep_mode
  (sweep)
  |S32
  b'azimuth_surveillance' ... b'az...
  standard_name :
  scan_mode_for_sweep
  options :
  sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi
```
array([b'azimuth_surveillance', b'azimuth_surveillance',
       b'azimuth_surveillance', b'azimuth_surveillance',
       b'azimuth_surveillance', b'azimuth_surveillance',
       b'azimuth_surveillance', b'azimuth_surveillance',
       b'azimuth_surveillance'], dtype='|S32')
```
- polarization_mode
  (sweep)
  |S32
  b'not_set' ... b'not_set'
  standard_name :
  polarization_mode_for_sweep
  options :
  horizontal, vertical, hv_alt, hv_sim, circular
  meta_group :
  radar_parameters
```
array([b'not_set', b'not_set', b'not_set', b'not_set', b'not_set',
       b'not_set', b'not_set', b'not_set', b'not_set'], dtype='|S32')
```
- prt_mode
  (sweep)
  |S32
  b'not_set' ... b'not_set'
  standard_name :
  transmit_pulse_mode
  options :
  fixed, staggered, dual
  meta_group :
  radar_parameters
```
array([b'not_set', b'not_set', b'not_set', b'not_set', b'not_set',
       b'not_set', b'not_set', b'not_set', b'not_set'], dtype='|S32')
```
- follow_mode
  (sweep)
  |S32
  b'not_set' ... b'not_set'
  standard_name :
  follow_mode_for_scan_strategy
  options :
  none, sun, vehicle, aircraft, target, manual
  meta_group :
  instrument_parameters
```
array([b'not_set', b'not_set', b'not_set', b'not_set', b'not_set',
       b'not_set', b'not_set', b'not_set', b'not_set'], dtype='|S32')
```
- fixed_angle
  (sweep)
  float32
  0.4999 1.099 1.802 ... 9.102 12.8
  standard_name :
  beam_target_fixed_angle
  units :
  degrees
```
array([ 0.4999,  1.0986,  1.8018,  2.5983,  3.598 ,  4.7021,  6.4984,
        9.1022, 12.7991], dtype=float32)
```
- target_scan_rate
  (sweep)
  float32
  -9.999e+03 ... -9.999e+03
  standard_name :
  target_scan_rate_for_sweep
  units :
  degrees per second
```
array([-9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999.], dtype=float32)
```
- sweep_start_ray_index
  (sweep)
  int32
  0 483 966 1448 ... 2894 3376 3860
  standard_name :
  index_of_first_ray_in_sweep
```
array([   0,  483,  966, 1448, 1931, 2412, 2894, 3376, 3860], dtype=int32)
```
- sweep_end_ray_index
  (sweep)
  int32
  482 965 1447 ... 3375 3859 4342
  standard_name :
  index_of_last_ray_in_sweep
```
array([ 482,  965, 1447, 1930, 2411, 2893, 3375, 3859, 4342], dtype=int32)
```
- r_calib_time
  (r_calib)
  |S32
  b'2008-06-04T00:15:03Z'
  standard_name :
  radar_calibration_time_utc
  meta_group :
  radar_calibration
```
array([b'2008-06-04T00:15:03Z'], dtype='|S32')
```
- r_calib_pulse_width
  (r_calib)
  timedelta64[ns]
  00:00:00
  standard_name :
  radar_calibration_pulse_width
  meta_group :
  radar_calibration
```
array([0], dtype='timedelta64[ns]')
```
- r_calib_xmit_power_h
  (r_calib)
  float32
  145.3
  standard_name :
  calibrated_radar_xmit_power_h_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([145.29], dtype=float32)
```
- r_calib_xmit_power_v
  (r_calib)
  float32
  145.3
  standard_name :
  calibrated_radar_xmit_power_v_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([145.29], dtype=float32)
```
- r_calib_two_way_waveguide_loss_h
  (r_calib)
  float32
  -36.89
  standard_name :
  radar_calibration_two_way_waveguide_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-36.888298], dtype=float32)
```
- r_calib_two_way_waveguide_loss_v
  (r_calib)
  float32
  -36.89
  standard_name :
  radar_calibration_two_way_waveguide_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-36.888298], dtype=float32)
```
- r_calib_two_way_radome_loss_h
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_two_way_radome_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_two_way_radome_loss_v
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_two_way_radome_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_receiver_mismatch_loss
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_receiver_mismatch_loss
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_radar_constant_h
  (r_calib)
  float32
  -70.72
  standard_name :
  calibrated_radar_constant_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-70.72], dtype=float32)
```
- r_calib_radar_constant_v
  (r_calib)
  float32
  -70.72
  standard_name :
  calibrated_radar_constant_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-70.72], dtype=float32)
```
- r_calib_antenna_gain_h
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_antenna_gain_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_antenna_gain_v
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_antenna_gain_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_noise_hc
  (r_calib)
  float32
  -114.7
  standard_name :
  calibrated_radar_receiver_noise_h_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-114.66051], dtype=float32)
```
- r_calib_noise_vc
  (r_calib)
  float32
  -114.7
  standard_name :
  calibrated_radar_receiver_noise_v_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-114.66051], dtype=float32)
```
- r_calib_noise_hx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_noise_h_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_noise_vx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_noise_v_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_receiver_gain_hc
  (r_calib)
  float32
  36.89
  standard_name :
  calibrated_radar_receiver_gain_h_co_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([36.8883], dtype=float32)
```
- r_calib_receiver_gain_vc
  (r_calib)
  float32
  36.89
  standard_name :
  calibrated_radar_receiver_gain_v_co_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([36.8883], dtype=float32)
```
- r_calib_receiver_gain_hx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_gain_h_cross_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_receiver_gain_vx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_gain_v_cross_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_base_dbz_1km_hc
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_base_dbz_1km_vc
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_base_dbz_1km_hx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_base_dbz_1km_vx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_sun_power_hc
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_h_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_sun_power_vc
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_v_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_sun_power_hx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_h_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_sun_power_vx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_v_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_noise_source_power_h
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_noise_source_power_h_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_noise_source_power_v
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_noise_source_power_v_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_power_measure_loss_h
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_power_measurement_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_power_measure_loss_v
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_power_measurement_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_coupler_forward_loss_h
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_coupler_forward_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_coupler_forward_loss_v
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_coupler_forward_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_zdr_correction
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_zdr_correction
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_ldr_correction_h
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_ldr_correction_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_ldr_correction_v
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_ldr_correction_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_system_phidp
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_system_phidp
  units :
  degrees
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_test_power_h
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_test_power_h_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_test_power_v
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  radar_calibration_test_power_v_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_receiver_slope_hc
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_h_co_polar_channel
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_receiver_slope_vc
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_v_co_polar_channel
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_receiver_slope_hx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_h_cross_polar_channel
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- r_calib_receiver_slope_vx
  (r_calib)
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_v_cross_polar_channel
  meta_group :
  radar_calibration
```
array([-9999.], dtype=float32)
```
- azimuth
  (time)
  float32
  121.5 122.2 123.0 ... 212.2 213.0
  standard_name :
  beam_azimuth_angle
  units :
  degrees
```
array([121.5 , 122.25, 123.  , ..., 211.5 , 212.25, 213.  ], dtype=float32)
```
- elevation
  (time)
  float32
  0.379 0.2362 0.1648 ... 12.81 12.81
  standard_name :
  beam_elevation_angle
  units :
  degrees
  positive :
  up
```
array([ 0.379 ,  0.2362,  0.1648, ..., 12.8103, 12.8103, 12.8103],
      dtype=float32)
```
- pulse_width
  (time)
  timedelta64[ns]
  00:00:00 00:00:00 ... 00:00:00
  standard_name :
  transmitter_pulse_width
  meta_group :
  instrument_parameters
```
array([0, 0, 0, ..., 0, 0, 0], dtype='timedelta64[ns]')
```
- prt
  (time)
  timedelta64[ns]
  -1 days +21:13:21 ... -1 days +2...
  standard_name :
  pulse_repetition_frequency
  meta_group :
  instrument_parameters
```
array([-9999000000000, -9999000000000, -9999000000000, ...,
       -9999000000000, -9999000000000, -9999000000000],
      dtype='timedelta64[ns]')
```
- prt_ratio
  (time)
  timedelta64[ns]
  -1 days +21:13:21 ... -1 days +2...
  standard_name :
  pulse_repetition_frequency_ratio
  meta_group :
  instrument_parameters
```
array([-9999000000000, -9999000000000, -9999000000000, ...,
       -9999000000000, -9999000000000, -9999000000000],
      dtype='timedelta64[ns]')
```
- nyquist_velocity
  (time)
  float32
  26.92 26.92 26.92 ... 26.92 26.92
  standard_name :
  unambiguous_doppler_velocity
  units :
  meters per second
  meta_group :
  instrument_parameters
```
array([26.925, 26.925, 26.925, ..., 26.925, 26.925, 26.925], dtype=float32)
```
- unambiguous_range
  (time)
  float32
  1.5e+05 1.5e+05 ... 1.5e+05 1.5e+05
  standard_name :
  unambiguous_range
  units :
  meters
  meta_group :
  instrument_parameters
```
array([150000., 150000., 150000., ..., 150000., 150000., 150000.],
      dtype=float32)
```
- antenna_transition
  (time)
  int8
  0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0
  standard_name :
  antenna_is_in_transition_between_sweeps
  comment :
  1 if antenna is in transition, 0 otherwise
```
array([0, 0, 0, ..., 0, 0, 0], dtype=int8)
```
- n_samples
  (time)
  int32
  192 192 192 192 ... 192 192 192 192
  standard_name :
  number_of_samples_used_to_compute_moments
  meta_group :
  instrument_parameters
```
array([192, 192, 192, ..., 192, 192, 192], dtype=int32)
```
- r_calib_index
  (time)
  int8
  -1 -1 -1 -1 -1 ... -1 -1 -1 -1 -1
  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
```
array([-1, -1, -1, ..., -1, -1, -1], dtype=int8)
```
- measured_transmit_power_h
  (time)
  float32
  -9.999e+03 ... -9.999e+03
  standard_name :
  measured_radar_transmit_power_h_channel
  units :
  dBm
  meta_group :
  radar_parameters
```
array([-9999., -9999., -9999., ..., -9999., -9999., -9999.], dtype=float32)
```
- measured_transmit_power_v
  (time)
  float32
  -9.999e+03 ... -9.999e+03
  standard_name :
  measured_radar_transmit_power_v_channel
  units :
  dBm
  meta_group :
  radar_parameters
```
array([-9999., -9999., -9999., ..., -9999., -9999., -9999.], dtype=float32)
```
- scan_rate
  (time)
  float32
  -3.277e+04 ... -3.277e+04
  standard_name :
  antenna_angle_scan_rate
  units :
  degrees per second
  meta_group :
  instrument_parameters
```
array([-32768., -32768., -32768., ..., -32768., -32768., -32768.],
      dtype=float32)
```
- DBZ
  (time, range)
  float32
  -3.07 16.3 37.71 ... -8.67 nan
  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
```
array([[ -3.0696433 ,  16.299232  ,  37.70946   , ...,  -6.0401773 ,
          0.21002503,  -3.480046  ],
       [-10.929477  ,  13.470829  ,   6.5597186 , ...,  -0.71027195,
          1.2795594 ,  -1.5595036 ],
       [ -6.079263  ,  10.450549  ,   3.2391877 , ...,  -5.0203886 ,
         -0.8701691 ,  -3.5599947 ],
       ...,
       [ 16.839329  ,  29.410799  ,  27.680357  , ...,          nan,
         -6.4292603 , -15.1098995 ],
       [ 16.890852  ,  26.7494    ,  23.73978   , ...,          nan,
                 nan,  -8.660714  ],
       [ 16.359638  ,  27.870457  ,  30.130337  , ...,  -8.680257  ,
         -8.669597  ,          nan]], dtype=float32)
```
- VR
  (time, range)
  float32
  -25.24 3.48 25.8 ... -12.92 nan
  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
```
array([[-25.240273  ,   3.4801476 ,  25.799713  , ..., -18.63985   ,
         10.249873  ,  26.31008   ],
       [ -6.409851  ,  23.62002   , -26.610249  , ..., -16.64991   ,
         19.330154  , -20.600348  ],
       [ 26.710032  ,  24.829687  ,  -0.48010498, ...,   5.6598406 ,
         21.28002   ,  14.659968  ],
       ...,
       [  0.08015382,  -1.5098361 ,  -1.2800074 , ...,          nan,
         20.319809  , -19.020172  ],
       [ -0.04989166,  -0.849794  ,  -1.3797907 , ...,          nan,
                 nan,  -5.3997498 ],
       [ -0.07033906,  -0.97983944,  -0.97983944, ...,  -7.970397  ,
        -12.920303  ,          nan]], dtype=float32)
```

Indexes: (2)

time

PandasIndex

PandasIndex(DatetimeIndex(['2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               ...
               '2008-06-04 00:22:16', '2008-06-04 00:22:16',
               '2008-06-04 00:22:16', '2008-06-04 00:22:16',
               '2008-06-04 00:22:16', '2008-06-04 00:22:16',
               '2008-06-04 00:22:16', '2008-06-04 00:22:16',
               '2008-06-04 00:22:17', '2008-06-04 00:22:17'],
              dtype='datetime64[ns]', name='time', length=4343, freq=None))

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

Attributes: (14)
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
n_gates_vary :
false

Extract CfRadial2 Groups and Subgroups#

Now as we have the CfRadial1 Dataset we can work towards extracting the CfRadial2 groups and subgroups.

Extract CfRadial2 Root-Group#

The following sections present the details of the information in the top-level (root) group of the data set.

We use a convenience function to extract the CfRadial2 root group from the CfRadial1 Dataset. We can call this function with one kwarg:

optional=False - only mandatory data and metadata is imported, defaults to True

optional=True#

[4]:

root = xd.io.backends.cfradial1._get_required_root_dataset(ds)
with xr.set_options(
    display_expand_data_vars=True, display_expand_attrs=True, display_max_rows=1000
):
    display(root.load())

<xarray.Dataset> Size: 477B
Dimensions:              (sweep: 9)
Dimensions without coordinates: sweep
Data variables:
    volume_number        int32 4B 36
    platform_type        |S32 32B b'fixed'
    primary_axis         |S32 32B b'axis_z'
    status_str           |S1 1B b''
    instrument_type      |S32 32B b'radar'
    time_coverage_start  |S32 32B b'2008-06-04T00:15:03Z'
    time_coverage_end    |S32 32B b'2008-06-04T00:22:17Z'
    latitude             float64 8B 22.53
    longitude            float64 8B 120.4
    altitude             float64 8B 45.0
    sweep_group_name     (sweep) <U7 252B 'sweep_0' 'sweep_1' ... 'sweep_8'
    sweep_fixed_angle    (sweep) float32 36B 0.4999 1.099 1.802 ... 9.102 12.8
Attributes:
    Conventions:         CF/Radial instrument_parameters radar_parameters rad...
    version:             1.2
    title:               TIMREX
    institution:
    references:
    source:
    history:
    comment:
    instrument_name:     SPOLRVP8
    site_name:
    scan_name:
    scan_id:             0
    platform_is_mobile:  false

xarray.Dataset

Dimensions:
- sweep: 9
Coordinates: (0)
Data variables: (12)
- volume_number
  ()
  int32
  36
  standard_name :
  data_volume_index_number
```
array(36, dtype=int32)
```
- platform_type
  ()
  |S32
  b'fixed'
  standard_name :
  platform_type
  options :
  fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat
```
array(b'fixed', dtype='|S32')
```
- primary_axis
  ()
  |S32
  b'axis_z'
  standard_name :
  primary_axis_of_rotation
  options :
  axis_z, axis_y, axis_x
```
array(b'axis_z', dtype='|S32')
```
- status_str
  ()
  |S1
  b''
  standard_name :
  status_xml
```
array(b'', dtype='|S1')
```
- instrument_type
  ()
  |S32
  b'radar'
  standard_name :
  type_of_instrument
  options :
  radar, lidar
  meta_group :
  instrument_parameters
```
array(b'radar', dtype='|S32')
```
- time_coverage_start
  ()
  |S32
  b'2008-06-04T00:15:03Z'
  standard_name :
  data_volume_start_time_utc
  comment :
  ray times are relative to start time in secs
```
array(b'2008-06-04T00:15:03Z', dtype='|S32')
```
- time_coverage_end
  ()
  |S32
  b'2008-06-04T00:22:17Z'
  standard_name :
  data_volume_end_time_utc
```
array(b'2008-06-04T00:22:17Z', dtype='|S32')
```
- latitude
  ()
  float64
  22.53
  standard_name :
  latitude
  units :
  degrees_north
```
array(22.52669907)
```
- longitude
  ()
  float64
  120.4
  standard_name :
  longitude
  units :
  degrees_east
```
array(120.4335022)
```
- altitude
  ()
  float64
  45.0
  standard_name :
  altitude
  units :
  meters
  positive :
  up
```
array(45.00000179)
```
- 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
  0.4999 1.099 1.802 ... 9.102 12.8
  standard_name :
  beam_target_fixed_angle
  units :
  degrees
```
array([ 0.4999,  1.0986,  1.8018,  2.5983,  3.598 ,  4.7021,  6.4984,
        9.1022, 12.7991], dtype=float32)
```
Indexes: (0)
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

optional=False#

[5]:

root = xd.io.backends.cfradial1._get_required_root_dataset(ds, optional=False)
with xr.set_options(
    display_expand_data_vars=True, display_expand_attrs=True, display_max_rows=1000
):
    display(root)

<xarray.Dataset> Size: 380B
Dimensions:              (sweep: 9)
Dimensions without coordinates: sweep
Data variables:
    volume_number        int32 4B 36
    time_coverage_start  |S32 32B b'2008-06-04T00:15:03Z'
    time_coverage_end    |S32 32B b'2008-06-04T00:22:17Z'
    latitude             float64 8B 22.53
    longitude            float64 8B 120.4
    altitude             float64 8B 45.0
    sweep_group_name     (sweep) <U7 252B 'sweep_0' 'sweep_1' ... 'sweep_8'
    sweep_fixed_angle    (sweep) float32 36B 0.4999 1.099 1.802 ... 9.102 12.8
Attributes:
    Conventions:         CF/Radial instrument_parameters radar_parameters rad...
    version:             1.2
    title:               TIMREX
    institution:
    references:
    source:
    history:
    comment:
    instrument_name:     SPOLRVP8
    platform_is_mobile:  false

xarray.Dataset

Dimensions:
- sweep: 9
Coordinates: (0)
Data variables: (8)
- volume_number
  ()
  int32
  36
  standard_name :
  data_volume_index_number
```
array(36, dtype=int32)
```
- time_coverage_start
  ()
  |S32
  b'2008-06-04T00:15:03Z'
  standard_name :
  data_volume_start_time_utc
  comment :
  ray times are relative to start time in secs
```
array(b'2008-06-04T00:15:03Z', dtype='|S32')
```
- time_coverage_end
  ()
  |S32
  b'2008-06-04T00:22:17Z'
  standard_name :
  data_volume_end_time_utc
```
array(b'2008-06-04T00:22:17Z', dtype='|S32')
```
- latitude
  ()
  float64
  22.53
  standard_name :
  latitude
  units :
  degrees_north
```
array(22.52669907)
```
- longitude
  ()
  float64
  120.4
  standard_name :
  longitude
  units :
  degrees_east
```
array(120.4335022)
```
- altitude
  ()
  float64
  45.0
  standard_name :
  altitude
  units :
  meters
  positive :
  up
```
array(45.00000179)
```
- 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
  0.4999 1.099 1.802 ... 9.102 12.8
  standard_name :
  beam_target_fixed_angle
  units :
  degrees
```
array([ 0.4999,  1.0986,  1.8018,  2.5983,  3.598 ,  4.7021,  6.4984,
        9.1022, 12.7991], dtype=float32)
```
Indexes: (0)
Attributes: (10)
Conventions :
CF/Radial instrument_parameters radar_parameters radar_calibration geometry_correction
version :
1.2
title :
TIMREX
institution :
references :
source :
history :
comment :
instrument_name :
SPOLRVP8
platform_is_mobile :
false

Extract Root-Group metadata groups#

The Cfradial2 Data Model has a notion of root group metadata groups. Those groups provide additional metadata covering other aspects of the radar system.

The radar_parameters sub-group#

This group holds radar parameters specific to a radar instrument. It’s implemented as dictionary where the value can be used to override the name.

[6]:

display(xd.model.radar_parameters_subgroup)

{'radar_antenna_gain_h': None,
 'radar_antenna_gain_v': None,
 'radar_beam_width_h': None,
 'radar_beam_width_v': None,
 'half_power_beam_width_h': 'radar_beam_width_h',
 'half_power_beam_width_v': 'radar_beam_width_v',
 'radar_receiver_bandwidth': None,
 'radar_rx_bandwidth': 'radar_receiver_bandwidth'}

Again we use a convenience function to extract the group.

[7]:

radar_parameters = xd.io.backends.cfradial1._get_subgroup(
    ds, xd.model.radar_parameters_subgroup
)
display(radar_parameters.load())

<xarray.Dataset> Size: 20B
Dimensions:                   ()
Data variables:
    radar_receiver_bandwidth  float32 4B -9.999e+03
    radar_antenna_gain_v      float32 4B 45.15
    radar_beam_width_h        float32 4B 0.92
    radar_antenna_gain_h      float32 4B 45.15
    radar_beam_width_v        float32 4B 0.92

xarray.Dataset

Dimensions:
Coordinates: (0)
Data variables: (5)
- radar_receiver_bandwidth
  ()
  float32
  -9.999e+03
  standard_name :
  radar_receiver_bandwidth
  units :
  s-1
  meta_group :
  radar_parameters
```
array(-9999., dtype=float32)
```
- radar_antenna_gain_v
  ()
  float32
  45.15
  standard_name :
  nominal_radar_antenna_gain_v_channel
  units :
  dB
  meta_group :
  radar_parameters
```
array(45.15, dtype=float32)
```
- radar_beam_width_h
  ()
  float32
  0.92
  standard_name :
  half_power_radar_beam_width_h_channel
  units :
  degrees
  meta_group :
  radar_parameters
```
array(0.92, dtype=float32)
```
- radar_antenna_gain_h
  ()
  float32
  45.15
  standard_name :
  nominal_radar_antenna_gain_h_channel
  units :
  dB
  meta_group :
  radar_parameters
```
array(45.15, dtype=float32)
```
- radar_beam_width_v
  ()
  float32
  0.92
  standard_name :
  half_power_radar_beam_width_v_channel
  units :
  degrees
  meta_group :
  radar_parameters
```
array(0.92, dtype=float32)
```
Indexes: (0)
Attributes: (0)

The radar_calibration sub-group#

For a radar, a different calibration is required for each pulse width. Therefore the calibration variables are arrays. If only one calibration is available it is squeezed by the reader.

[8]:

display(xd.model.radar_calibration_subgroup)

{'calib_index': None,
 'time': None,
 'pulse_width': None,
 'antenna_gain_h': None,
 'antenna_gain_v': None,
 'ant_gain_h': 'antenna_gain_h',
 'ant_gain_v': 'antenna_gain_v',
 'xmit_power_h': None,
 'xmit_power_v': None,
 'tx_power_h': 'xmit_power_h',
 'tx_power_v': 'xmit_power_v',
 'two_way_waveguide_loss_h': None,
 'two_way_waveguide_loss_v': None,
 'two_way_radome_loss_h': None,
 'two_way_radome_loss_v': None,
 'receiver_mismatch_loss': None,
 'receiver_mismatch_loss_h': None,
 'receiver_mismatch_loss_v': None,
 'rx_loss_h': 'receiver_mismatch_loss_h',
 'rx_loss_v': 'receiver_mismatch_loss_v',
 'radar_constant_h': None,
 'radar_constant_v': None,
 'probert_jones_correction': None,
 'dielectric_factor_used': None,
 'noise_hc': None,
 'noise_vc': None,
 'noise_hx': None,
 'noise_vx': None,
 'receiver_gain_hc': None,
 'receiver_gain_vc': None,
 'receiver_gain_hx': None,
 'receiver_gain_vx': None,
 'base_1km_hc': None,
 'base_dbz_1km_hc': 'base_1km_hc',
 'base_1km_vc': None,
 'base_dbz_1km_vc': 'base_1km_vc',
 'base_1km_hx': None,
 'base_dbz_1km_hx': 'base_1km_hx',
 'base_1km_vx': None,
 'base_dbz_1km_vx': 'base_1km_vx',
 'sun_power_hc': None,
 'sun_power_vc': None,
 'sun_power_hx': None,
 'sun_power_vx': None,
 'noise_source_power_h': None,
 'noise_source_power_v': None,
 'noise_power_short_pulse_h': 'noise_source_power_h',
 'noise_power_short_pulse_v': 'noise_source_power_v',
 'noise_power_h': 'noise_source_power_h',
 'noise_power_v': 'noise_source_power_v',
 'power_measure_loss_h': None,
 'power_measure_loss_v': None,
 'coupler_forward_loss_h': None,
 'coupler_forward_loss_v': None,
 'zdr_correction': None,
 'ldr_correction_h': None,
 'ldr_correction_v': None,
 'system_phidp': None,
 'test_power_h': None,
 'test_power_v': None,
 'receiver_slope_hc': None,
 'receiver_slope_vc': None,
 'receiver_slope_hx': None,
 'receiver_slope_vx': None,
 'k_squared_water': None,
 'i0_dbm_hc': None,
 'i0_dbm_vc': None,
 'i0_dbm_hx': None,
 'i0_dbm_vx': None,
 'dynamic_range_db_hc': None,
 'dynamic_range_db_vc': None,
 'dynamic_range_db_hx': None,
 'dynamic_range_db_vx': None,
 'dbz_correction': None}

Again we use a convenience function to extract the group.

[9]:

radar_calibration = xd.io.backends.cfradial1._get_radar_calibration(ds)
with xr.set_options(display_expand_data_vars=True):
    if radar_calibration:
        display(radar_calibration.load())

<xarray.Dataset> Size: 212B
Dimensions:                   ()
Data variables: (12/45)
    time                      |S32 32B b'2008-06-04T00:15:03Z'
    pulse_width               timedelta64[ns] 8B 00:00:00
    xmit_power_h              float32 4B 145.3
    xmit_power_v              float32 4B 145.3
    two_way_waveguide_loss_h  float32 4B -36.89
    two_way_waveguide_loss_v  float32 4B -36.89
    ...                        ...
    test_power_h              float32 4B -9.999e+03
    test_power_v              float32 4B -9.999e+03
    receiver_slope_hc         float32 4B -9.999e+03
    receiver_slope_vc         float32 4B -9.999e+03
    receiver_slope_hx         float32 4B -9.999e+03
    receiver_slope_vx         float32 4B -9.999e+03

xarray.Dataset

Dimensions:
Coordinates: (0)
Data variables: (45)
- time
  ()
  |S32
  b'2008-06-04T00:15:03Z'
  standard_name :
  radar_calibration_time_utc
  meta_group :
  radar_calibration
```
array(b'2008-06-04T00:15:03Z', dtype='|S32')
```
- pulse_width
  ()
  timedelta64[ns]
  00:00:00
  standard_name :
  radar_calibration_pulse_width
  meta_group :
  radar_calibration
```
array(0, dtype='timedelta64[ns]')
```
- xmit_power_h
  ()
  float32
  145.3
  standard_name :
  calibrated_radar_xmit_power_h_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(145.29, dtype=float32)
```
- xmit_power_v
  ()
  float32
  145.3
  standard_name :
  calibrated_radar_xmit_power_v_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(145.29, dtype=float32)
```
- two_way_waveguide_loss_h
  ()
  float32
  -36.89
  standard_name :
  radar_calibration_two_way_waveguide_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-36.888298, dtype=float32)
```
- two_way_waveguide_loss_v
  ()
  float32
  -36.89
  standard_name :
  radar_calibration_two_way_waveguide_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-36.888298, dtype=float32)
```
- two_way_radome_loss_h
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_two_way_radome_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- two_way_radome_loss_v
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_two_way_radome_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- receiver_mismatch_loss
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_receiver_mismatch_loss
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- radar_constant_h
  ()
  float32
  -70.72
  standard_name :
  calibrated_radar_constant_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-70.72, dtype=float32)
```
- radar_constant_v
  ()
  float32
  -70.72
  standard_name :
  calibrated_radar_constant_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-70.72, dtype=float32)
```
- antenna_gain_h
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_antenna_gain_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- antenna_gain_v
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_antenna_gain_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- noise_hc
  ()
  float32
  -114.7
  standard_name :
  calibrated_radar_receiver_noise_h_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-114.66051, dtype=float32)
```
- noise_vc
  ()
  float32
  -114.7
  standard_name :
  calibrated_radar_receiver_noise_v_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-114.66051, dtype=float32)
```
- noise_hx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_noise_h_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- noise_vx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_noise_v_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- receiver_gain_hc
  ()
  float32
  36.89
  standard_name :
  calibrated_radar_receiver_gain_h_co_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(36.8883, dtype=float32)
```
- receiver_gain_vc
  ()
  float32
  36.89
  standard_name :
  calibrated_radar_receiver_gain_v_co_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(36.8883, dtype=float32)
```
- receiver_gain_hx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_gain_h_cross_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- receiver_gain_vx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_gain_v_cross_polar_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- base_1km_hc
  ()
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- base_1km_vc
  ()
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- base_1km_hx
  ()
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- base_1km_vx
  ()
  float32
  -9.999e+03
  standard_name :
  radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel
  units :
  dBZ
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- sun_power_hc
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_h_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- sun_power_vc
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_v_co_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- sun_power_hx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_h_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- sun_power_vx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_sun_power_v_cross_polar_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- noise_source_power_h
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_noise_source_power_h_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- noise_source_power_v
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_noise_source_power_v_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- power_measure_loss_h
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_power_measurement_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- power_measure_loss_v
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_power_measurement_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- coupler_forward_loss_h
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_coupler_forward_loss_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- coupler_forward_loss_v
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_coupler_forward_loss_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- zdr_correction
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_zdr_correction
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- ldr_correction_h
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_ldr_correction_h_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- ldr_correction_v
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_ldr_correction_v_channel
  units :
  dB
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- system_phidp
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_system_phidp
  units :
  degrees
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- test_power_h
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_test_power_h_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- test_power_v
  ()
  float32
  -9.999e+03
  standard_name :
  radar_calibration_test_power_v_channel
  units :
  dBm
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- receiver_slope_hc
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_h_co_polar_channel
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- receiver_slope_vc
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_v_co_polar_channel
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- receiver_slope_hx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_h_cross_polar_channel
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
- receiver_slope_vx
  ()
  float32
  -9.999e+03
  standard_name :
  calibrated_radar_receiver_slope_v_cross_polar_channel
  meta_group :
  radar_calibration
```
array(-9999., dtype=float32)
```
Indexes: (0)
Attributes: (0)

The georeference_correction sub-group#

The following additional variables are used to quantify errors in the georeference data for moving platforms. These are constant for a volume.

[10]:

display(xd.model.georeferencing_correction_subgroup)

{'azimuth_correction': None,
 'elevation_correction': None,
 'range_correction': None,
 'longitude_correction': None,
 'latitude_correction': None,
 'pressure_altitude_correction': None,
 'altitude_correction': 'radar_altitude_correction',
 'radar_altitude_correction': None,
 'eastward_velocity_correction': 'eastward_ground_speed_correction',
 'eastward_ground_speed_correction': None,
 'northward_velocity_correction': 'northward_ground_speed_correction',
 'northward_ground_speed_correction': None,
 'vertical_velocity_correction': None,
 'heading_correction': None,
 'roll_correction': None,
 'pitch_correction': None,
 'drift_correction': None,
 'rotation_correction': None,
 'tilt_correction': None}

Again we use a convenience function to extract the group.

[11]:

georeference_correction = xd.io.backends.cfradial1._get_subgroup(
    ds, xd.model.georeferencing_correction_subgroup
)
with xr.set_options(display_expand_data_vars=True):
    display(georeference_correction.load())

<xarray.Dataset> Size: 64B
Dimensions:                            ()
Data variables: (12/16)
    heading_correction                 float32 4B 0.0
    drift_correction                   float32 4B 0.0
    longitude_correction               float32 4B 0.0
    vertical_velocity_correction       float32 4B 0.0
    tilt_correction                    float32 4B 0.0
    northward_ground_speed_correction  float32 4B 0.0
    ...                                 ...
    radar_altitude_correction          float32 4B 0.0
    latitude_correction                float32 4B 0.0
    roll_correction                    float32 4B 0.0
    azimuth_correction                 float32 4B 0.0
    range_correction                   float32 4B 0.0
    pressure_altitude_correction       float32 4B 0.0

xarray.Dataset

Dimensions:
Coordinates: (0)
Data variables: (16)
- heading_correction
  ()
  float32
  0.0
  standard_name :
  platform_heading_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- drift_correction
  ()
  float32
  0.0
  standard_name :
  platform_drift_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- longitude_correction
  ()
  float32
  0.0
  standard_name :
  longitude_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- vertical_velocity_correction
  ()
  float32
  0.0
  standard_name :
  platform_vertical_velocity_correction
  units :
  meters per second
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- tilt_correction
  ()
  float32
  0.0
  standard_name :
  beam_tilt_angle_relative_to_platform_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- northward_ground_speed_correction
  ()
  float32
  0.0
  standard_name :
  platform_northward_velocity_correction
  units :
  meters per second
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- elevation_correction
  ()
  float32
  0.0
  standard_name :
  beam_elevation_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- rotation_correction
  ()
  float32
  0.0
  standard_name :
  beam_rotation_angle_relative_to_platform_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- eastward_ground_speed_correction
  ()
  float32
  0.0
  standard_name :
  platform_eastward_velocity_correction
  units :
  meters per second
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- pitch_correction
  ()
  float32
  0.0
  standard_name :
  platform_pitch_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- radar_altitude_correction
  ()
  float32
  0.0
  standard_name :
  altitude_correction
  units :
  meters
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- latitude_correction
  ()
  float32
  0.0
  standard_name :
  latitude_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- roll_correction
  ()
  float32
  0.0
  standard_name :
  platform_roll_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- azimuth_correction
  ()
  float32
  0.0
  standard_name :
  azimuth_angle_correction
  units :
  degrees
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- range_correction
  ()
  float32
  0.0
  standard_name :
  range_to_center_of_measurement_volume_correction
  units :
  meters
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
- pressure_altitude_correction
  ()
  float32
  0.0
  standard_name :
  pressure_altitude_correction
  units :
  meters
  meta_group :
  geometry_correction
```
array(0., dtype=float32)
```
Indexes: (0)
Attributes: (0)

Sweep groups#

This section provides details of the information in each sweep group. The name of the sweep groups is found in the sweep_group_name array variable in the root group.

[12]:

root.sweep_group_name

[12]:

<xarray.DataArray 'sweep_group_name' (sweep: 9)> Size: 252B
array(['sweep_0', 'sweep_1', 'sweep_2', 'sweep_3', 'sweep_4', 'sweep_5',
       'sweep_6', 'sweep_7', 'sweep_8'], dtype='<U7')
Dimensions without coordinates: sweep

xarray.DataArray

'sweep_group_name'

sweep: 9

'sweep_0' 'sweep_1' 'sweep_2' ... 'sweep_6' 'sweep_7' 'sweep_8'

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

Coordinates: (0)
Indexes: (0)
Attributes: (0)

Again we use a convenience function to extract the different sweep groups. We can call this function with kwargs:

optional=False - only mandatory data and metadata is imported, defaults to True
first_dim="time - return first dimension as time, defaults toauto (return either as azimuth (PPI) or elevation (RHI)to time
site_coords=False - do not add radar site coordinates to the Sweep-Dataset, defaults to True

Examining first sweep with default kwargs.#

[13]:

sweeps = xd.io.backends.cfradial1._get_sweep_groups(ds)
with xr.set_options(display_expand_data_vars=True):
    display(sweeps["sweep_0"])

<xarray.Dataset> 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 0.5164 0.5219 ... 0.5219
    latitude                   float64 8B 22.53
    longitude                  float64 8B 120.4
    altitude                   float64 8B 45.0
Data variables: (12/18)
    sweep_number               int32 4B 0
    sweep_mode                 <U20 80B 'azimuth_surveillance'
    prt_mode                   |S32 32B b'not_set'
    follow_mode                |S32 32B b'not_set'
    sweep_fixed_angle          float32 4B 0.4999
    pulse_width                (azimuth) timedelta64[ns] 4kB 00:00:00 ... 00:...
    ...                         ...
    r_calib_index              (azimuth) int8 483B -1 -1 -1 -1 ... -1 -1 -1 -1
    measured_transmit_power_h  (azimuth) float32 2kB -9.999e+03 ... -9.999e+03
    measured_transmit_power_v  (azimuth) float32 2kB -9.999e+03 ... -9.999e+03
    scan_rate                  (azimuth) float32 2kB -3.277e+04 ... -3.277e+04
    DBZ                        (azimuth, range) float32 2MB 20.7 39.97 ... -1.32
    VR                         (azimuth, range) float32 2MB -23.38 ... -25.39

xarray.Dataset

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

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, 0.5164, 0.5219, 0.5219, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5219, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5109, 0.5109, 0.5109, 0.5109,
       0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109,
...
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219], dtype=float32)

latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
```
array(22.52669907)
```
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
```
array(120.4335022)
```
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
```
array(45.00000179)
```

Data variables: (18)

sweep_number
()
int32
0
standard_name :
sweep_index_number_0_based
```
array(0, dtype=int32)
```

sweep_mode

()

<U20

'azimuth_surveillance'

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

prt_mode
()
|S32
b'not_set'
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
```
array(b'not_set', dtype='|S32')
```
follow_mode
()
|S32
b'not_set'
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
```
array(b'not_set', dtype='|S32')
```
sweep_fixed_angle
()
float32
0.4999
standard_name :
beam_target_fixed_angle
units :
degrees
```
array(0.4999, dtype=float32)
```

pulse_width

(azimuth)

timedelta64[ns]

00:00:00 00:00:00 ... 00:00:00

standard_name :: transmitter_pulse_width
meta_group :: instrument_parameters

array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
      dtype='timedelta64[ns]')

prt

(azimuth)

timedelta64[ns]

-1 days +21:13:21 ... -1 days +2...

standard_name :: pulse_repetition_frequency
meta_group :: instrument_parameters

array([-9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
...
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000],
      dtype='timedelta64[ns]')

prt_ratio

(azimuth)

timedelta64[ns]

-1 days +21:13:21 ... -1 days +2...

standard_name :: pulse_repetition_frequency_ratio
meta_group :: instrument_parameters

array([-9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
...
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000],
      dtype='timedelta64[ns]')

nyquist_velocity

(azimuth)

float32

26.92 26.92 26.92 ... 26.92 26.92

standard_name :: unambiguous_doppler_velocity
units :: meters per second
meta_group :: instrument_parameters

array([26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
...
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925], dtype=float32)

unambiguous_range

(azimuth)

float32

1.5e+05 1.5e+05 ... 1.5e+05 1.5e+05

standard_name :: unambiguous_range
units :: meters
meta_group :: instrument_parameters

array([150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
...
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.],
      dtype=float32)

antenna_transition

(azimuth)

int8

0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0

standard_name :: antenna_is_in_transition_between_sweeps
comment :: 1 if antenna is in transition, 0 otherwise

array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
      dtype=int8)

n_samples

(azimuth)

int32

192 192 192 192 ... 192 192 192 192

standard_name :: number_of_samples_used_to_compute_moments
meta_group :: instrument_parameters

array([192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
       192, 192], dtype=int32)

r_calib_index

(azimuth)

int8

-1 -1 -1 -1 -1 ... -1 -1 -1 -1 -1

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

array([-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
       -1, -1, -1, -1, -1, -1, -1], dtype=int8)

measured_transmit_power_h

(azimuth)

float32

-9.999e+03 ... -9.999e+03

standard_name :: measured_radar_transmit_power_h_channel
units :: dBm
meta_group :: radar_parameters

array([-9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
...
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999.], dtype=float32)

measured_transmit_power_v

(azimuth)

float32

-9.999e+03 ... -9.999e+03

standard_name :: measured_radar_transmit_power_v_channel
units :: dBm
meta_group :: radar_parameters

array([-9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
...
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999., -9999., -9999., -9999., -9999., -9999.,
       -9999., -9999., -9999.], dtype=float32)

scan_rate

(azimuth)

float32

-3.277e+04 ... -3.277e+04

standard_name :: antenna_angle_scan_rate
units :: degrees per second
meta_group :: instrument_parameters

array([-32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
...
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.,
       -32768., -32768., -32768., -32768., -32768., -32768., -32768.],
      dtype=float32)

DBZ

(azimuth, range)

float32

20.7 39.97 29.65 ... -3.16 -1.32

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

array([[ 20.699957  ,  39.96934   ,  29.650644  , ...,  -2.7995949 ,
         -3.5493348 ,  -1.6501119 ],
       [ 13.829709  ,  35.710747  ,   8.869345  , ..., -18.780428  ,
         -3.0803032 ,  -4.5193777 ],
       [ -9.1297455 ,  14.810412  ,   4.539685  , ...,   0.17982224,
         -0.5503748 ,  -3.519132  ],
       ...,
       [  5.8899274 ,  26.049406  ,  32.379555  , ...,  -2.550866  ,
         -1.060269  ,  -1.9006175 ],
       [  0.959765  ,  23.579884  ,   9.29929   , ...,  -8.680257  ,
         -5.039932  ,  -2.4105117 ],
       [ 20.079912  ,  39.15031   ,  13.190121  , ...,  -4.9191203 ,
         -3.1602516 ,  -1.3196578 ]], dtype=float32)

(azimuth, range)

float32

-23.38 10.22 1.17 ... 20.63 -25.39

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

array([[-23.380377  ,  10.219611  ,   1.1695913 , ...,  22.359642  ,
         -2.2598467 ,  23.109653  ],
       [  8.669698  ,   8.860268  ,   1.109885  , ...,  16.950077  ,
        -17.420368  , -16.98034   ],
       [  4.4796166 ,   4.9597216 ,  -0.7999023 , ..., -22.860195  ,
         25.97965   , -22.330198  ],
       ...,
       [-21.76994   , -20.16032   ,   1.0599933 , ...,  16.92963   ,
        -25.179747  , -10.590118  ],
       [  8.189593  ,   8.69996   ,  -0.16030763, ..., -26.499832  ,
        -18.880312  ,  18.109854  ],
       [ 10.419995  ,  10.270321  ,   1.5000213 , ..., -11.900388  ,
         20.629791  , -25.389946  ]], dtype=float32)

Indexes: (2)

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

azimuth

PandasIndex

PandasIndex(Index([   0.0,   0.75,    1.5,   2.25,    3.0,   3.75,    4.5,   5.25,    6.0,
         6.75,
       ...
        352.5, 353.25,  354.0, 354.75,  355.5, 356.25,  357.0, 357.75,  358.5,
       359.25],
      dtype='float32', name='azimuth', length=483))

Attributes: (0)

Examining first sweep with `optional=False`#

[14]:

sweeps = xd.io.backends.cfradial1._get_sweep_groups(ds, optional=False)
with xr.set_options(display_expand_data_vars=True):
    display(sweeps["sweep_0"])

<xarray.Dataset> Size: 4MB
Dimensions:            (azimuth: 483, range: 996)
Coordinates:
    time               (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:34 ... 2...
  * range              (range) float32 4kB 150.0 300.0 ... 1.492e+05 1.494e+05
  * azimuth            (azimuth) float32 2kB 0.0 0.75 1.5 ... 357.8 358.5 359.2
    elevation          (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219 0.5219
    latitude           float64 8B 22.53
    longitude          float64 8B 120.4
    altitude           float64 8B 45.0
Data variables:
    sweep_number       int32 4B 0
    sweep_mode         <U20 80B 'azimuth_surveillance'
    prt_mode           |S32 32B b'not_set'
    follow_mode        |S32 32B b'not_set'
    sweep_fixed_angle  float32 4B 0.4999
    DBZ                (azimuth, range) float32 2MB 20.7 39.97 ... -3.16 -1.32
    VR                 (azimuth, range) float32 2MB -23.38 10.22 ... -25.39

xarray.Dataset

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

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, 0.5164, 0.5219, 0.5219, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5219, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5109, 0.5109, 0.5109, 0.5109,
       0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109,
...
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219], dtype=float32)

latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
```
array(22.52669907)
```
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
```
array(120.4335022)
```
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
```
array(45.00000179)
```

Data variables: (7)

sweep_number
()
int32
0
standard_name :
sweep_index_number_0_based
```
array(0, dtype=int32)
```

sweep_mode

()

<U20

'azimuth_surveillance'

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

prt_mode
()
|S32
b'not_set'
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
```
array(b'not_set', dtype='|S32')
```
follow_mode
()
|S32
b'not_set'
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
```
array(b'not_set', dtype='|S32')
```
sweep_fixed_angle
()
float32
0.4999
standard_name :
beam_target_fixed_angle
units :
degrees
```
array(0.4999, dtype=float32)
```

DBZ

(azimuth, range)

float32

20.7 39.97 29.65 ... -3.16 -1.32

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

array([[ 20.699957  ,  39.96934   ,  29.650644  , ...,  -2.7995949 ,
         -3.5493348 ,  -1.6501119 ],
       [ 13.829709  ,  35.710747  ,   8.869345  , ..., -18.780428  ,
         -3.0803032 ,  -4.5193777 ],
       [ -9.1297455 ,  14.810412  ,   4.539685  , ...,   0.17982224,
         -0.5503748 ,  -3.519132  ],
       ...,
       [  5.8899274 ,  26.049406  ,  32.379555  , ...,  -2.550866  ,
         -1.060269  ,  -1.9006175 ],
       [  0.959765  ,  23.579884  ,   9.29929   , ...,  -8.680257  ,
         -5.039932  ,  -2.4105117 ],
       [ 20.079912  ,  39.15031   ,  13.190121  , ...,  -4.9191203 ,
         -3.1602516 ,  -1.3196578 ]], dtype=float32)

(azimuth, range)

float32

-23.38 10.22 1.17 ... 20.63 -25.39

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

array([[-23.380377  ,  10.219611  ,   1.1695913 , ...,  22.359642  ,
         -2.2598467 ,  23.109653  ],
       [  8.669698  ,   8.860268  ,   1.109885  , ...,  16.950077  ,
        -17.420368  , -16.98034   ],
       [  4.4796166 ,   4.9597216 ,  -0.7999023 , ..., -22.860195  ,
         25.97965   , -22.330198  ],
       ...,
       [-21.76994   , -20.16032   ,   1.0599933 , ...,  16.92963   ,
        -25.179747  , -10.590118  ],
       [  8.189593  ,   8.69996   ,  -0.16030763, ..., -26.499832  ,
        -18.880312  ,  18.109854  ],
       [ 10.419995  ,  10.270321  ,   1.5000213 , ..., -11.900388  ,
         20.629791  , -25.389946  ]], dtype=float32)

Indexes: (2)

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

azimuth

PandasIndex

PandasIndex(Index([   0.0,   0.75,    1.5,   2.25,    3.0,   3.75,    4.5,   5.25,    6.0,
         6.75,
       ...
        352.5, 353.25,  354.0, 354.75,  355.5, 356.25,  357.0, 357.75,  358.5,
       359.25],
      dtype='float32', name='azimuth', length=483))

Attributes: (0)

`optional=False` and `site_coords=False`#

[15]:

sweeps = xd.io.backends.cfradial1._get_sweep_groups(
    ds, optional=False, site_coords=False
)
with xr.set_options(display_expand_data_vars=True):
    display(sweeps["sweep_0"])

<xarray.Dataset> Size: 4MB
Dimensions:            (azimuth: 483, range: 996)
Coordinates:
    time               (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:34 ... 2...
  * range              (range) float32 4kB 150.0 300.0 ... 1.492e+05 1.494e+05
  * azimuth            (azimuth) float32 2kB 0.0 0.75 1.5 ... 357.8 358.5 359.2
    elevation          (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219 0.5219
Data variables:
    sweep_number       int32 4B 0
    sweep_mode         <U20 80B 'azimuth_surveillance'
    prt_mode           |S32 32B b'not_set'
    follow_mode        |S32 32B b'not_set'
    sweep_fixed_angle  float32 4B 0.4999
    DBZ                (azimuth, range) float32 2MB 20.7 39.97 ... -3.16 -1.32
    VR                 (azimuth, range) float32 2MB -23.38 10.22 ... -25.39

xarray.Dataset

Dimensions:
- azimuth: 483
- range: 996

Coordinates: (4)

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, 0.5164, 0.5219, 0.5219, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5219, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5109, 0.5109, 0.5109, 0.5109,
       0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109,
...
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219], dtype=float32)

Data variables: (7)

sweep_number
()
int32
0
standard_name :
sweep_index_number_0_based
```
array(0, dtype=int32)
```

sweep_mode

()

<U20

'azimuth_surveillance'

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

prt_mode
()
|S32
b'not_set'
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
```
array(b'not_set', dtype='|S32')
```
follow_mode
()
|S32
b'not_set'
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
```
array(b'not_set', dtype='|S32')
```
sweep_fixed_angle
()
float32
0.4999
standard_name :
beam_target_fixed_angle
units :
degrees
```
array(0.4999, dtype=float32)
```

DBZ

(azimuth, range)

float32

20.7 39.97 29.65 ... -3.16 -1.32

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

array([[ 20.699957  ,  39.96934   ,  29.650644  , ...,  -2.7995949 ,
         -3.5493348 ,  -1.6501119 ],
       [ 13.829709  ,  35.710747  ,   8.869345  , ..., -18.780428  ,
         -3.0803032 ,  -4.5193777 ],
       [ -9.1297455 ,  14.810412  ,   4.539685  , ...,   0.17982224,
         -0.5503748 ,  -3.519132  ],
       ...,
       [  5.8899274 ,  26.049406  ,  32.379555  , ...,  -2.550866  ,
         -1.060269  ,  -1.9006175 ],
       [  0.959765  ,  23.579884  ,   9.29929   , ...,  -8.680257  ,
         -5.039932  ,  -2.4105117 ],
       [ 20.079912  ,  39.15031   ,  13.190121  , ...,  -4.9191203 ,
         -3.1602516 ,  -1.3196578 ]], dtype=float32)

(azimuth, range)

float32

-23.38 10.22 1.17 ... 20.63 -25.39

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

array([[-23.380377  ,  10.219611  ,   1.1695913 , ...,  22.359642  ,
         -2.2598467 ,  23.109653  ],
       [  8.669698  ,   8.860268  ,   1.109885  , ...,  16.950077  ,
        -17.420368  , -16.98034   ],
       [  4.4796166 ,   4.9597216 ,  -0.7999023 , ..., -22.860195  ,
         25.97965   , -22.330198  ],
       ...,
       [-21.76994   , -20.16032   ,   1.0599933 , ...,  16.92963   ,
        -25.179747  , -10.590118  ],
       [  8.189593  ,   8.69996   ,  -0.16030763, ..., -26.499832  ,
        -18.880312  ,  18.109854  ],
       [ 10.419995  ,  10.270321  ,   1.5000213 , ..., -11.900388  ,
         20.629791  , -25.389946  ]], dtype=float32)

Indexes: (2)

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

azimuth

PandasIndex

PandasIndex(Index([   0.0,   0.75,    1.5,   2.25,    3.0,   3.75,    4.5,   5.25,    6.0,
         6.75,
       ...
        352.5, 353.25,  354.0, 354.75,  355.5, 356.25,  357.0, 357.75,  358.5,
       359.25],
      dtype='float32', name='azimuth', length=483))

Attributes: (0)

`optional=False`, `site_coords=True` and `first_dim="auto"`#

[16]:

sweeps = xd.io.backends.cfradial1._get_sweep_groups(
    ds, optional=False, site_coords=False, first_dim="time"
)
with xr.set_options(display_expand_data_vars=True):
    display(sweeps["sweep_0"])

<xarray.Dataset> Size: 4MB
Dimensions:            (time: 483, range: 996)
Coordinates:
  * time               (time) datetime64[ns] 4kB 2008-06-04T00:15:03 ... 2008...
  * range              (range) float32 4kB 150.0 300.0 ... 1.492e+05 1.494e+05
    azimuth            (time) float32 2kB 121.5 122.2 123.0 ... 122.2 123.0
    elevation          (time) float32 2kB 0.379 0.2362 0.1648 ... 0.5109 0.5109
Data variables:
    sweep_number       int32 4B 0
    sweep_mode         <U20 80B 'azimuth_surveillance'
    prt_mode           |S32 32B b'not_set'
    follow_mode        |S32 32B b'not_set'
    sweep_fixed_angle  float32 4B 0.4999
    DBZ                (time, range) float32 2MB -3.07 16.3 ... -0.2697 -0.01028
    VR                 (time, range) float32 2MB -25.24 3.48 ... 3.19 -23.05

xarray.Dataset

Dimensions:
- time: 483
- range: 996

Coordinates: (4)

time

(time)

datetime64[ns]

2008-06-04T00:15:03 ... 2008-06-...

standard_name :: time
long_name :: time in seconds since volume start
comment :: times are relative to the volume start_time

array(['2008-06-04T00:15:03.000000000', '2008-06-04T00:15:03.000000000',
       '2008-06-04T00:15:03.000000000', ..., '2008-06-04T00:15:50.000000000',
       '2008-06-04T00:15:50.000000000', '2008-06-04T00:15:50.000000000'],
      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

(time)

float32

121.5 122.2 123.0 ... 122.2 123.0

standard_name :: beam_azimuth_angle
units :: degrees

array([121.5 , 122.25, 123.  , 123.75, 124.5 , 125.25, 126.  , 126.75,
       127.5 , 128.25, 129.  , 129.75, 130.5 , 131.25, 132.  , 132.75,
       133.5 , 134.25, 135.  , 135.75, 136.5 , 137.25, 138.  , 138.75,
       139.5 , 140.25, 141.  , 141.75, 142.5 , 143.25, 144.  , 144.75,
       145.5 , 146.25, 147.  , 147.75, 148.5 , 149.25, 150.  , 150.75,
       151.5 , 152.25, 153.  , 153.75, 154.5 , 155.25, 156.  , 156.75,
       157.5 , 158.25, 159.  , 159.75, 160.5 , 161.25, 162.  , 162.75,
       163.5 , 164.25, 165.  , 165.75, 166.5 , 167.25, 168.  , 168.75,
       169.5 , 170.25, 171.  , 171.75, 172.5 , 173.25, 174.  , 174.75,
       175.5 , 176.25, 177.  , 177.75, 178.5 , 179.25, 180.  , 180.75,
       181.5 , 182.25, 183.  , 183.75, 184.5 , 185.25, 186.  , 186.75,
       187.5 , 188.25, 189.  , 189.75, 190.5 , 191.25, 192.  , 192.75,
       193.5 , 194.25, 195.  , 195.75, 196.5 , 197.25, 198.  , 198.75,
       199.5 , 200.25, 201.  , 201.75, 202.5 , 203.25, 204.  , 204.75,
       205.5 , 206.25, 207.  , 207.75, 208.5 , 209.25, 210.  , 210.75,
       211.5 , 212.25, 213.  , 213.75, 214.5 , 215.25, 216.  , 216.75,
       217.5 , 218.25, 219.  , 219.75, 220.5 , 221.25, 222.  , 222.75,
       223.5 , 224.25, 225.  , 225.75, 226.5 , 227.25, 228.  , 228.75,
       229.5 , 230.25, 231.  , 231.75, 232.5 , 233.25, 234.  , 234.75,
       235.5 , 236.25, 237.  , 237.75, 238.5 , 239.25, 240.  , 240.75,
...
         7.5 ,   8.25,   9.  ,   9.75,  10.5 ,  11.25,  12.  ,  12.75,
        13.5 ,  14.25,  15.  ,  15.75,  16.5 ,  17.25,  18.  ,  18.75,
        19.5 ,  20.25,  21.  ,  21.75,  22.5 ,  23.25,  24.  ,  24.75,
        25.5 ,  26.25,  27.  ,  27.75,  28.5 ,  29.25,  30.  ,  30.75,
        31.5 ,  32.25,  33.  ,  33.75,  34.5 ,  35.25,  36.  ,  36.75,
        37.5 ,  38.25,  39.  ,  39.75,  40.5 ,  41.25,  42.  ,  42.75,
        43.5 ,  44.25,  45.  ,  45.75,  46.5 ,  47.25,  48.  ,  48.75,
        49.5 ,  50.25,  51.  ,  51.75,  52.5 ,  53.25,  54.  ,  54.75,
        55.5 ,  56.25,  57.  ,  57.75,  58.5 ,  59.25,  60.  ,  60.75,
        61.5 ,  62.25,  63.  ,  63.75,  64.5 ,  65.25,  66.  ,  66.75,
        67.5 ,  68.25,  69.  ,  69.75,  70.5 ,  71.25,  72.  ,  72.75,
        73.5 ,  74.25,  75.  ,  75.75,  76.5 ,  77.25,  78.  ,  78.75,
        79.5 ,  80.25,  81.  ,  81.75,  82.5 ,  83.25,  84.  ,  84.75,
        85.5 ,  86.25,  87.  ,  87.75,  88.5 ,  89.25,  90.  ,  90.75,
        91.5 ,  92.25,  93.  ,  93.75,  94.5 ,  95.25,  96.  ,  96.75,
        97.5 ,  98.25,  99.  ,  99.75, 100.5 , 101.25, 102.  , 102.75,
       103.5 , 104.25, 105.  , 105.75, 106.5 , 107.25, 108.  , 108.75,
       109.5 , 110.25, 111.  , 111.75, 112.5 , 113.25, 114.  , 114.75,
       115.5 , 116.25, 117.  , 117.75, 118.5 , 119.25, 120.  , 120.75,
       121.5 , 122.25, 123.  ], dtype=float32)

elevation

(time)

float32

0.379 0.2362 ... 0.5109 0.5109

standard_name :: beam_elevation_angle
units :: degrees
positive :: up

array([0.379 , 0.2362, 0.1648, 0.1648, 0.2142, 0.2417, 0.2911, 0.3571,
       0.4175, 0.4779, 0.5054, 0.5274, 0.5164, 0.5109, 0.5274, 0.5219,
       0.5164, 0.5219, 0.5164, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
       0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219, 0.5219,
...
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5219, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164, 0.5164,
       0.5164, 0.5164, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109,
       0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109, 0.5109,
       0.5109, 0.5109, 0.5109], dtype=float32)

Data variables: (7)

sweep_number
()
int32
0
standard_name :
sweep_index_number_0_based
```
array(0, dtype=int32)
```

sweep_mode

()

<U20

'azimuth_surveillance'

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

prt_mode
()
|S32
b'not_set'
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
```
array(b'not_set', dtype='|S32')
```
follow_mode
()
|S32
b'not_set'
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
```
array(b'not_set', dtype='|S32')
```
sweep_fixed_angle
()
float32
0.4999
standard_name :
beam_target_fixed_angle
units :
degrees
```
array(0.4999, dtype=float32)
```

DBZ

(time, range)

float32

-3.07 16.3 ... -0.2697 -0.01028

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

array([[-3.0696433e+00,  1.6299232e+01,  3.7709461e+01, ...,
        -6.0401773e+00,  2.1002503e-01, -3.4800460e+00],
       [-1.0929477e+01,  1.3470829e+01,  6.5597186e+00, ...,
        -7.1027195e-01,  1.2795594e+00, -1.5595036e+00],
       [-6.0792632e+00,  1.0450549e+01,  3.2391877e+00, ...,
        -5.0203886e+00, -8.7016910e-01, -3.5599947e+00],
       ...,
       [-1.7496034e+00,  1.6560398e+01,  7.5795074e+00, ...,
        -2.4691408e+00, -1.5701632e+00, -4.8196287e+00],
       [ 1.4129961e+01,  1.5430458e+01,  7.0998158e+00, ...,
         6.2042773e-01, -2.2594976e+00,  4.6941376e-01],
       [ 7.2099671e+00,  1.5799997e+01,  1.8770531e+01, ...,
        -1.8971786e-01, -2.6966643e-01, -1.0277718e-02]], dtype=float32)

(time, range)

float32

-25.24 3.48 25.8 ... 3.19 -23.05

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

array([[-25.240273  ,   3.4801476 ,  25.799713  , ..., -18.63985   ,
         10.249873  ,  26.31008   ],
       [ -6.409851  ,  23.62002   , -26.610249  , ..., -16.64991   ,
         19.330154  , -20.600348  ],
       [ 26.710032  ,  24.829687  ,  -0.48010498, ...,   5.6598406 ,
         21.28002   ,  14.659968  ],
       ...,
       [  5.200183  ,   1.7797418 ,  -3.1096408 , ...,   0.61015046,
         22.389904  ,  -7.7601976 ],
       [  2.0897243 ,   1.6398816 , -18.419836  , ...,  -3.7598681 ,
        -20.83999   ,  17.250246  ],
       [  2.1698782 ,  -0.08015382,  -1.2399304 , ...,   6.9104037 ,
          3.1897945 , -23.049946  ]], dtype=float32)

Indexes: (2)

time

PandasIndex

PandasIndex(DatetimeIndex(['2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               '2008-06-04 00:15:03', '2008-06-04 00:15:03',
               ...
               '2008-06-04 00:15:49', '2008-06-04 00:15:49',
               '2008-06-04 00:15:49', '2008-06-04 00:15:49',
               '2008-06-04 00:15:49', '2008-06-04 00:15:49',
               '2008-06-04 00:15:49', '2008-06-04 00:15:50',
               '2008-06-04 00:15:50', '2008-06-04 00:15:50'],
              dtype='datetime64[ns]', name='time', length=483, freq=None))

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

Attributes: (0)

Read as CfRadial2 data representation#

xradar provides two easy ways to retrieve the CfRadial1 data as CfRadial2 groups.

DataTree#

This is the most complete representation as a DataTree. All groups and subgroups are represented in a tree-like structure. Can be parameterized using kwargs. Easy write to netCDF4.

[17]:

dtree = xd.io.open_cfradial1_datatree(filename)
with xr.set_options(display_expand_data_vars=True, display_expand_attrs=True):
    display(dtree)

<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

xarray.DataTree

Groups: (12)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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: (sweep: 9, 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 ... Dimensions without coordinates: sweep 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:
sweep: 9
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)
<xarray.DatasetView> Size: 20B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: radar_receiver_bandwidth float32 4B ... radar_antenna_gain_v float32 4B ... radar_beam_width_h float32 4B ... radar_antenna_gain_h float32 4B ... radar_beam_width_v float32 4B ...
radar_parameters
Groups: (0)
Dimensions:
sweep: 9
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_antenna_gain_v
()
float32
...
standard_name :
nominal_radar_antenna_gain_v_channel
units :
dB
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]
Attributes: (0)
<xarray.DatasetView> Size: 64B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: (12/16) heading_correction float32 4B ... drift_correction float32 4B ... longitude_correction float32 4B ... vertical_velocity_correction float32 4B ... tilt_correction float32 4B ... northward_ground_speed_correction float32 4B ... ... ... radar_altitude_correction float32 4B ... latitude_correction float32 4B ... roll_correction float32 4B ... azimuth_correction float32 4B ... range_correction float32 4B ... pressure_altitude_correction float32 4B ...
georeferencing_correction
Groups: (0)
Dimensions:
sweep: 9
Coordinates: (0)
Data variables: (16)
heading_correction
()
float32
...
standard_name :
platform_heading_angle_correction
units :
degrees
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]
longitude_correction
()
float32
...
standard_name :
longitude_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]
tilt_correction
()
float32
...
standard_name :
beam_tilt_angle_relative_to_platform_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]
elevation_correction
()
float32
...
standard_name :
beam_elevation_angle_correction
units :
degrees
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]
eastward_ground_speed_correction
()
float32
...
standard_name :
platform_eastward_velocity_correction
units :
meters per second
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]
radar_altitude_correction
()
float32
...
standard_name :
altitude_correction
units :
meters
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]
roll_correction
()
float32
...
standard_name :
platform_roll_angle_correction
units :
degrees
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]
pressure_altitude_correction
()
float32
...
standard_name :
pressure_altitude_correction
units :
meters
meta_group :
geometry_correction
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 212B Dimensions: (sweep: 9) Dimensions without coordinates: sweep 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:
sweep: 9
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)
Dimensions:
- sweep: 9
Coordinates: (0)
Inherited 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

Each DataTree-node itself represents another DataTree.

[18]:

display(dtree["radar_parameters"].load())

<xarray.DatasetView> Size: 20B
Dimensions:                   (sweep: 9)
Dimensions without coordinates: sweep
Data variables:
    radar_receiver_bandwidth  float32 4B -9.999e+03
    radar_antenna_gain_v      float32 4B 45.15
    radar_beam_width_h        float32 4B 0.92
    radar_antenna_gain_h      float32 4B 45.15
    radar_beam_width_v        float32 4B 0.92

xarray.DataTree

Groups: (0)
Dimensions:
- sweep: 9
Coordinates: (0)
Inherited coordinates: (0)
Data variables: (5)
- radar_receiver_bandwidth
  ()
  float32
  -9.999e+03
  standard_name :
  radar_receiver_bandwidth
  units :
  s-1
  meta_group :
  radar_parameters
```
array(-9999., dtype=float32)
```
- radar_antenna_gain_v
  ()
  float32
  45.15
  standard_name :
  nominal_radar_antenna_gain_v_channel
  units :
  dB
  meta_group :
  radar_parameters
```
array(45.15, dtype=float32)
```
- radar_beam_width_h
  ()
  float32
  0.92
  standard_name :
  half_power_radar_beam_width_h_channel
  units :
  degrees
  meta_group :
  radar_parameters
```
array(0.92, dtype=float32)
```
- radar_antenna_gain_h
  ()
  float32
  45.15
  standard_name :
  nominal_radar_antenna_gain_h_channel
  units :
  dB
  meta_group :
  radar_parameters
```
array(45.15, dtype=float32)
```
- radar_beam_width_v
  ()
  float32
  0.92
  standard_name :
  half_power_radar_beam_width_v_channel
  units :
  degrees
  meta_group :
  radar_parameters
```
array(0.92, dtype=float32)
```
Attributes: (0)

[19]:

with xr.set_options(display_expand_data_vars=True):
    display(dtree["sweep_7"].load())

<xarray.DatasetView> Size: 4MB
Dimensions:                    (sweep: 9, 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
Dimensions without coordinates: sweep
Data variables: (12/18)
    sweep_number               int32 4B 7
    sweep_mode                 <U20 80B 'azimuth_surveillance'
    prt_mode                   |S32 32B b'not_set'
    follow_mode                |S32 32B b'not_set'
    sweep_fixed_angle          float32 4B 9.102
    pulse_width                (azimuth) timedelta64[ns] 4kB 00:00:00 ... 00:...
    ...                         ...
    r_calib_index              (azimuth) int8 484B -1 -1 -1 -1 ... -1 -1 -1 -1
    measured_transmit_power_h  (azimuth) float32 2kB -9.999e+03 ... -9.999e+03
    measured_transmit_power_v  (azimuth) float32 2kB -9.999e+03 ... -9.999e+03
    scan_rate                  (azimuth) float32 2kB -3.277e+04 ... -3.277e+04
    DBZ                        (azimuth, range) float32 2MB 21.88 ... -8.661
    VR                         (azimuth, range) float32 2MB -0.4204 ... 11.4

xarray.DataTree

Groups: (0)
Dimensions:
- sweep: 9
- 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',
       '2008-06-04T00:21:03.000000000', '2008-06-04T00:21:03.000000000',
       '2008-06-04T00:21:03.000000000', '2008-06-04T00:21:03.000000000',
       '2008-06-04T00:21:03.000000000', '2008-06-04T00:21:03.000000000',
       '2008-06-04T00:21:03.000000000', '2008-06-04T00:21:03.000000000',
       '2008-06-04T00:21:03.000000000', '2008-06-04T00:21:03.000000000',
       '2008-06-04T00:21:04.000000000', '2008-06-04T00:21:04.000000000',
       '2008-06-04T00:21:04.000000000', '2008-06-04T00:21:04.000000000',
       '2008-06-04T00:21:04.000000000', '2008-06-04T00:21:04.000000000',
       '2008-06-04T00:21:04.000000000', '2008-06-04T00:21:04.000000000',
       '2008-06-04T00:21:04.000000000', '2008-06-04T00:21:04.000000000',
       '2008-06-04T00:21:05.000000000', '2008-06-04T00:21:05.000000000',
       '2008-06-04T00:21:05.000000000', '2008-06-04T00:21:05.000000000',
       '2008-06-04T00:21:05.000000000', '2008-06-04T00:21:05.000000000',
       '2008-06-04T00:21:05.000000000', '2008-06-04T00:21:05.000000000',
       '2008-06-04T00:21:05.000000000', '2008-06-04T00:21:05.000000000',
       '2008-06-04T00:21:06.000000000', '2008-06-04T00:21:06.000000000',
       '2008-06-04T00:21:06.000000000', '2008-06-04T00:21:06.000000000',
...
       '2008-06-04T00:20:58.000000000', '2008-06-04T00:20:58.000000000',
       '2008-06-04T00:20:58.000000000', '2008-06-04T00:20:59.000000000',
       '2008-06-04T00:20:59.000000000', '2008-06-04T00:20:59.000000000',
       '2008-06-04T00:20:59.000000000', '2008-06-04T00:20:59.000000000',
       '2008-06-04T00:20:59.000000000', '2008-06-04T00:20:59.000000000',
       '2008-06-04T00:20:59.000000000', '2008-06-04T00:20:59.000000000',
       '2008-06-04T00:20:59.000000000', '2008-06-04T00:21:00.000000000',
       '2008-06-04T00:21:00.000000000', '2008-06-04T00:21:00.000000000',
       '2008-06-04T00:21:00.000000000', '2008-06-04T00:21:00.000000000',
       '2008-06-04T00:21:00.000000000', '2008-06-04T00:21:00.000000000',
       '2008-06-04T00:21:00.000000000', '2008-06-04T00:21:00.000000000',
       '2008-06-04T00:21:00.000000000', '2008-06-04T00:21:01.000000000',
       '2008-06-04T00:21:01.000000000', '2008-06-04T00:21:01.000000000',
       '2008-06-04T00:21:01.000000000', '2008-06-04T00:21:01.000000000',
       '2008-06-04T00:21:01.000000000', '2008-06-04T00:21:01.000000000',
       '2008-06-04T00:21:01.000000000', '2008-06-04T00:21:01.000000000',
       '2008-06-04T00:21:01.000000000', '2008-06-04T00:21:01.000000000',
       '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, 9.1023, 9.1023,
       9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023,
       9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023,
       9.1023, 9.1023, 9.1023, 9.1023, 9.0968, 9.0913, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
       9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968, 9.0968,
...
       9.1902, 9.1902, 9.1902, 9.1902, 9.1902, 9.1902, 9.1902, 9.1902,
       9.1902, 9.1902, 9.1847, 9.1847, 9.1847, 9.1847, 9.1792, 9.1737,
       9.1682, 9.1627, 9.1627, 9.1627, 9.1627, 9.1627, 9.1627, 9.1627,
       9.1627, 9.1627, 9.1627, 9.1627, 9.1627, 9.1627, 9.1627, 9.1627,
       9.1627, 9.1572, 9.1518, 9.1463, 9.1463, 9.1408, 9.1408, 9.1408,
       9.1408, 9.1408, 9.1408, 9.1408, 9.1408, 9.1408, 9.1408, 9.1408,
       9.1408, 9.1408, 9.1408, 9.1408, 9.1408, 9.1408, 9.1408, 9.1408,
       9.1298, 9.1353, 9.1353, 9.1298, 9.1243, 9.1243, 9.1298, 9.1243,
       9.1243, 9.1243, 9.1243, 9.1243, 9.1243, 9.1243, 9.1243, 9.1243,
       9.1243, 9.1243, 9.1243, 9.1243, 9.1243, 9.1243, 9.1243, 9.1243,
       9.1243, 9.1243, 9.1243, 9.1243, 9.1243, 9.1188, 9.1188, 9.1188,
       9.1188, 9.1188, 9.1078, 9.1133, 9.1133, 9.1078, 9.1133, 9.1133,
       9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133,
       9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133,
       9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133, 9.1133,
       9.1133, 9.1133, 9.1133, 9.1078, 9.1078, 9.1078, 9.1078, 9.1078,
       9.1078, 9.1078, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023,
       9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023,
       9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 9.1023, 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(22.52669907)
```
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
```
array(120.4335022)
```
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
```
array(45.00000179)
```

Inherited coordinates: (0)

Data variables: (18)

sweep_number
()
int32
7
standard_name :
sweep_index_number_0_based
```
array(7, dtype=int32)
```

sweep_mode

()

<U20

'azimuth_surveillance'

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

prt_mode
()
|S32
b'not_set'
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
```
array(b'not_set', dtype='|S32')
```
follow_mode
()
|S32
b'not_set'
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
```
array(b'not_set', dtype='|S32')
```
sweep_fixed_angle
()
float32
9.102
standard_name :
beam_target_fixed_angle
units :
degrees
```
array(9.1022, dtype=float32)
```

pulse_width

(azimuth)

timedelta64[ns]

00:00:00 00:00:00 ... 00:00:00

standard_name :: transmitter_pulse_width
meta_group :: instrument_parameters

array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
      dtype='timedelta64[ns]')

prt

(azimuth)

timedelta64[ns]

-1 days +21:13:21 ... -1 days +2...

standard_name :: pulse_repetition_frequency
meta_group :: instrument_parameters

array([-9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
...
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000],
      dtype='timedelta64[ns]')

prt_ratio

(azimuth)

timedelta64[ns]

-1 days +21:13:21 ... -1 days +2...

standard_name :: pulse_repetition_frequency_ratio
meta_group :: instrument_parameters

array([-9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
...
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000,
       -9999000000000, -9999000000000, -9999000000000, -9999000000000],
      dtype='timedelta64[ns]')

nyquist_velocity

(azimuth)

float32

26.92 26.92 26.92 ... 26.92 26.92

standard_name :: unambiguous_doppler_velocity
units :: meters per second
meta_group :: instrument_parameters

array([26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
...
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925, 26.925,
       26.925, 26.925, 26.925, 26.925], dtype=float32)

unambiguous_range

(azimuth)

float32

1.5e+05 1.5e+05 ... 1.5e+05 1.5e+05

standard_name :: unambiguous_range
units :: meters
meta_group :: instrument_parameters

array([150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
...
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000., 150000., 150000., 150000., 150000., 150000., 150000.,
       150000.], dtype=float32)

antenna_transition
(azimuth)
int8
0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0

CfRadial1 to CfRadial2#

A data model transformation#

Download#

Open CfRadial1 file using xr.open_dataset#

Extract CfRadial2 Groups and Subgroups#

Extract CfRadial2 Root-Group#

optional=True#

optional=False#

Extract Root-Group metadata groups#

The radar_parameters sub-group#

The radar_calibration sub-group#

The georeference_correction sub-group#

Sweep groups#

Examining first sweep with default kwargs.#

Examining first sweep with optional=False#

optional=False and site_coords=False#

optional=False, site_coords=True and first_dim="auto"#

Read as CfRadial2 data representation#

DataTree#

Examining first sweep with `optional=False`#

`optional=False` and `site_coords=False`#

`optional=False`, `site_coords=True` and `first_dim="auto"`#