Create a Plan Position Indicator (PPI) Plot#

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

Imports#

[1]:

import xarray as xr
import xradar as xd
import cmweather
from open_radar_data import DATASETS

[2]:

import matplotlib.pyplot as plt
import pyproj
import cartopy

Read in some data#

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

[3]:

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

Read the data using the cfradial1 engine

[4]:

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

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

datatree.DataTree

Groups: (12)
<xarray.DatasetView> Size: 20B Dimensions: () Data variables: radar_beam_width_h float32 4B ... radar_beam_width_v float32 4B ... radar_receiver_bandwidth float32 4B ... radar_antenna_gain_h float32 4B ... radar_antenna_gain_v float32 4B ...
radar_parameters
Groups: (0)
Dimensions:
Coordinates: (0)
Data variables: (5)
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_beam_width_v
()
float32
...
standard_name :
half_power_radar_beam_width_v_channel
units :
degrees
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_receiver_bandwidth
()
float32
...
standard_name :
radar_receiver_bandwidth
units :
s-1
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_antenna_gain_v
()
float32
...
standard_name :
nominal_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_parameters
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 212B Dimensions: () Data variables: (12/45) time |S32 32B ... pulse_width timedelta64[ns] 8B ... xmit_power_h float32 4B ... xmit_power_v float32 4B ... two_way_waveguide_loss_h float32 4B ... two_way_waveguide_loss_v float32 4B ... ... ... test_power_h float32 4B ... test_power_v float32 4B ... receiver_slope_hc float32 4B ... receiver_slope_vc float32 4B ... receiver_slope_hx float32 4B ... receiver_slope_vx float32 4B ...
radar_calibration
Groups: (0)
Dimensions:
Coordinates: (0)
Data variables: (45)
time
()
|S32
...
standard_name :
radar_calibration_time_utc
meta_group :
radar_calibration
[1 values with dtype=|S32]
pulse_width
()
timedelta64[ns]
...
standard_name :
radar_calibration_pulse_width
meta_group :
radar_calibration
[1 values with dtype=timedelta64[ns]]
xmit_power_h
()
float32
...
standard_name :
calibrated_radar_xmit_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
xmit_power_v
()
float32
...
standard_name :
calibrated_radar_xmit_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_mismatch_loss
()
float32
...
standard_name :
radar_calibration_receiver_mismatch_loss
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_h
()
float32
...
standard_name :
calibrated_radar_constant_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_v
()
float32
...
standard_name :
calibrated_radar_constant_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_h
()
float32
...
standard_name :
calibrated_radar_antenna_gain_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_v
()
float32
...
standard_name :
calibrated_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hc
()
float32
...
standard_name :
calibrated_radar_sun_power_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vc
()
float32
...
standard_name :
calibrated_radar_sun_power_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hx
()
float32
...
standard_name :
calibrated_radar_sun_power_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vx
()
float32
...
standard_name :
calibrated_radar_sun_power_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_h
()
float32
...
standard_name :
radar_calibration_noise_source_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_v
()
float32
...
standard_name :
radar_calibration_noise_source_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_h
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_v
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_h
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_v
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
zdr_correction
()
float32
...
standard_name :
calibrated_radar_zdr_correction
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_h
()
float32
...
standard_name :
calibrated_radar_ldr_correction_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_v
()
float32
...
standard_name :
calibrated_radar_ldr_correction_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
system_phidp
()
float32
...
standard_name :
calibrated_radar_system_phidp
units :
degrees
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_h
()
float32
...
standard_name :
radar_calibration_test_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_v
()
float32
...
standard_name :
radar_calibration_test_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 64B Dimensions: () Data variables: (12/16) eastward_ground_speed_correction float32 4B ... longitude_correction float32 4B ... roll_correction float32 4B ... tilt_correction float32 4B ... radar_altitude_correction float32 4B ... vertical_velocity_correction float32 4B ... ... ... pressure_altitude_correction float32 4B ... elevation_correction float32 4B ... northward_ground_speed_correction float32 4B ... heading_correction float32 4B ... latitude_correction float32 4B ... azimuth_correction float32 4B ...
georeferencing_correction
Groups: (0)
Dimensions:
Coordinates: (0)
Data variables: (16)
eastward_ground_speed_correction
()
float32
...
standard_name :
platform_eastward_velocity_correction
units :
meters per second
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]
roll_correction
()
float32
...
standard_name :
platform_roll_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
tilt_correction
()
float32
...
standard_name :
beam_tilt_angle_relative_to_platform_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
radar_altitude_correction
()
float32
...
standard_name :
altitude_correction
units :
meters
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]
rotation_correction
()
float32
...
standard_name :
beam_rotation_angle_relative_to_platform_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]
pitch_correction
()
float32
...
standard_name :
platform_pitch_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]
elevation_correction
()
float32
...
standard_name :
beam_elevation_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
northward_ground_speed_correction
()
float32
...
standard_name :
platform_northward_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
heading_correction
()
float32
...
standard_name :
platform_heading_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
latitude_correction
()
float32
...
standard_name :
latitude_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
azimuth_correction
()
float32
...
standard_name :
azimuth_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_0
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:15:34 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[483 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[483 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[483 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[483 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_1
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:16:21 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000', ..., '2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[483 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[483 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[483 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[483 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 482B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_2
Groups: (0)
Dimensions:
azimuth: 482
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:17:07 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:17:07.000000000', '2008-06-04T00:17:08.000000000', '2008-06-04T00:17:08.000000000', ..., '2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[482 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[482 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[482 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[482 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[482 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[482 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[482 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[482 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[480072 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[480072 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_3
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:17:54 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:55.000000000', ..., '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[483 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[483 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[483 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[483 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 481, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 481B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_4
Groups: (0)
Dimensions:
azimuth: 481
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:18:41 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000', ..., '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[481 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[481 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[481 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[481 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[481 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[481 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[481 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[481 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[481 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[479076 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[479076 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 482B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_5
Groups: (0)
Dimensions:
azimuth: 482
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:19:28 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000', ..., '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[482 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[482 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[482 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[482 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[482 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[482 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[482 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[482 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[480072 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[480072 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 482B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_6
Groups: (0)
Dimensions:
azimuth: 482
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:20:15 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000', ..., '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[482 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[482 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[482 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[482 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[482 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[482 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[482 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[482 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[480072 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[480072 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 484, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 484B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_7
Groups: (0)
Dimensions:
azimuth: 484
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:21:02 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000', ..., '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[484 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[484 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[484 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[484 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[484 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[484 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[484 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[484 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[484 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[482064 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[482064 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB ... * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_8
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (7)
time
(azimuth)
datetime64[ns]
2008-06-04T00:21:49 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000', ..., '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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)
latitude
()
float64
...
standard_name :
latitude
units :
degrees_north
[1 values with dtype=float64]
longitude
()
float64
...
standard_name :
longitude
units :
degrees_east
[1 values with dtype=float64]
altitude
()
float64
...
standard_name :
altitude
units :
meters
positive :
up
[1 values with dtype=float64]
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[483 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[483 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[483 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[483 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
Attributes: (0)
Dimensions:
- sweep: 9
Coordinates: (0)
Data variables: (12)
- volume_number
  ()
  int32
  ...
  standard_name :
  data_volume_index_number
```
[1 values with dtype=int32]
```
- platform_type
  ()
  |S32
  ...
  standard_name :
  platform_type
  options :
  fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat
```
[1 values with dtype=|S32]
```
- primary_axis
  ()
  |S32
  ...
  standard_name :
  primary_axis_of_rotation
  options :
  axis_z, axis_y, axis_x
```
[1 values with dtype=|S32]
```
- status_str
  ()
  |S1
  ...
  standard_name :
  status_xml
```
[1 values with dtype=|S1]
```
- instrument_type
  ()
  |S32
  ...
  standard_name :
  type_of_instrument
  options :
  radar, lidar
  meta_group :
  instrument_parameters
```
[1 values with dtype=|S32]
```
- time_coverage_start
  ()
  |S32
  ...
  standard_name :
  data_volume_start_time_utc
  comment :
  ray times are relative to start time in secs
```
[1 values with dtype=|S32]
```
- time_coverage_end
  ()
  |S32
  ...
  standard_name :
  data_volume_end_time_utc
```
[1 values with dtype=|S32]
```
- latitude
  ()
  float64
  ...
  standard_name :
  latitude
  units :
  degrees_north
```
[1 values with dtype=float64]
```
- longitude
  ()
  float64
  ...
  standard_name :
  longitude
  units :
  degrees_east
```
[1 values with dtype=float64]
```
- altitude
  ()
  float64
  ...
  standard_name :
  altitude
  units :
  meters
  positive :
  up
```
[1 values with dtype=float64]
```
- sweep_group_name
  (sweep)
  <U7
  'sweep_0' 'sweep_1' ... 'sweep_8'
```
array(['sweep_0', 'sweep_1', 'sweep_2', 'sweep_3', 'sweep_4', 'sweep_5',
       'sweep_6', 'sweep_7', 'sweep_8'], dtype='<U7')
```
- sweep_fixed_angle
  (sweep)
  float32
  ...
  standard_name :
  beam_target_fixed_angle
  units :
  degrees
```
[9 values with dtype=float32]
```
Attributes: (13)
Conventions :
CF/Radial instrument_parameters radar_parameters radar_calibration geometry_correction
version :
1.2
title :
TIMREX
institution :
references :
source :
history :
comment :
instrument_name :
SPOLRVP8
site_name :
scan_name :
scan_id :
0
platform_is_mobile :
false

Add georeferencing#

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

Georeference Accessor#

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

[5]:

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

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

datatree.DataTree

Groups: (12)
<xarray.DatasetView> Size: 20B Dimensions: () Data variables: radar_beam_width_h float32 4B ... radar_beam_width_v float32 4B ... radar_receiver_bandwidth float32 4B ... radar_antenna_gain_h float32 4B ... radar_antenna_gain_v float32 4B ...
radar_parameters
Groups: (0)
Dimensions:
Coordinates: (0)
Data variables: (5)
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_beam_width_v
()
float32
...
standard_name :
half_power_radar_beam_width_v_channel
units :
degrees
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_receiver_bandwidth
()
float32
...
standard_name :
radar_receiver_bandwidth
units :
s-1
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_antenna_gain_v
()
float32
...
standard_name :
nominal_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_parameters
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 212B Dimensions: () Data variables: (12/45) time |S32 32B ... pulse_width timedelta64[ns] 8B ... xmit_power_h float32 4B ... xmit_power_v float32 4B ... two_way_waveguide_loss_h float32 4B ... two_way_waveguide_loss_v float32 4B ... ... ... test_power_h float32 4B ... test_power_v float32 4B ... receiver_slope_hc float32 4B ... receiver_slope_vc float32 4B ... receiver_slope_hx float32 4B ... receiver_slope_vx float32 4B ...
radar_calibration
Groups: (0)
Dimensions:
Coordinates: (0)
Data variables: (45)
time
()
|S32
...
standard_name :
radar_calibration_time_utc
meta_group :
radar_calibration
[1 values with dtype=|S32]
pulse_width
()
timedelta64[ns]
...
standard_name :
radar_calibration_pulse_width
meta_group :
radar_calibration
[1 values with dtype=timedelta64[ns]]
xmit_power_h
()
float32
...
standard_name :
calibrated_radar_xmit_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
xmit_power_v
()
float32
...
standard_name :
calibrated_radar_xmit_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_mismatch_loss
()
float32
...
standard_name :
radar_calibration_receiver_mismatch_loss
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_h
()
float32
...
standard_name :
calibrated_radar_constant_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_v
()
float32
...
standard_name :
calibrated_radar_constant_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_h
()
float32
...
standard_name :
calibrated_radar_antenna_gain_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_v
()
float32
...
standard_name :
calibrated_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hc
()
float32
...
standard_name :
calibrated_radar_sun_power_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vc
()
float32
...
standard_name :
calibrated_radar_sun_power_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hx
()
float32
...
standard_name :
calibrated_radar_sun_power_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vx
()
float32
...
standard_name :
calibrated_radar_sun_power_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_h
()
float32
...
standard_name :
radar_calibration_noise_source_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_v
()
float32
...
standard_name :
radar_calibration_noise_source_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_h
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_v
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_h
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_v
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
zdr_correction
()
float32
...
standard_name :
calibrated_radar_zdr_correction
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_h
()
float32
...
standard_name :
calibrated_radar_ldr_correction_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_v
()
float32
...
standard_name :
calibrated_radar_ldr_correction_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
system_phidp
()
float32
...
standard_name :
calibrated_radar_system_phidp
units :
degrees
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_h
()
float32
...
standard_name :
radar_calibration_test_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_v
()
float32
...
standard_name :
radar_calibration_test_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 64B Dimensions: () Data variables: (12/16) eastward_ground_speed_correction float32 4B ... longitude_correction float32 4B ... roll_correction float32 4B ... tilt_correction float32 4B ... radar_altitude_correction float32 4B ... vertical_velocity_correction float32 4B ... ... ... pressure_altitude_correction float32 4B ... elevation_correction float32 4B ... northward_ground_speed_correction float32 4B ... heading_correction float32 4B ... latitude_correction float32 4B ... azimuth_correction float32 4B ...
georeferencing_correction
Groups: (0)
Dimensions:
Coordinates: (0)
Data variables: (16)
eastward_ground_speed_correction
()
float32
...
standard_name :
platform_eastward_velocity_correction
units :
meters per second
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]
roll_correction
()
float32
...
standard_name :
platform_roll_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
tilt_correction
()
float32
...
standard_name :
beam_tilt_angle_relative_to_platform_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
radar_altitude_correction
()
float32
...
standard_name :
altitude_correction
units :
meters
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]
rotation_correction
()
float32
...
standard_name :
beam_rotation_angle_relative_to_platform_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]
pitch_correction
()
float32
...
standard_name :
platform_pitch_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]
elevation_correction
()
float32
...
standard_name :
beam_elevation_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
northward_ground_speed_correction
()
float32
...
standard_name :
platform_northward_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
heading_correction
()
float32
...
standard_name :
platform_heading_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
latitude_correction
()
float32
...
standard_name :
latitude_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
azimuth_correction
()
float32
...
standard_name :
azimuth_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 10MB 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 elevation (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.955e+03 y (azimuth, range) float32 2MB 150.0 ... 1.493e+05 z (azimuth, range) float32 2MB 46.0 ... 2.718e+03 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_0
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:15:34 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
0.5164 0.5219 ... 0.5219 0.5219
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([0.5164, 0.5219, 0.5164, ..., 0.5219, 0.5219, 0.5219], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.953e+03 -1.955e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9633473e+00, 3.9266944e+00, 5.8900409e+00, ..., 1.9510557e+03, 1.9530181e+03, 1.9549799e+03], [ 3.9263620e+00, 7.8527231e+00, 1.1779083e+01, ..., 3.9017876e+03, 3.9057109e+03, 3.9096350e+03], ..., [-5.8886724e+00, -1.1777344e+01, -1.7666014e+01, ..., -5.8518057e+03, -5.8576919e+03, -5.8635757e+03], [-3.9263809e+00, -7.8527613e+00, -1.1779141e+01, ..., -3.9017996e+03, -3.9057241e+03, -3.9096475e+03], [-1.9633456e+00, -3.9266911e+00, -5.8900361e+00, ..., -1.9510540e+03, -1.9530164e+03, -1.9549783e+03]], dtype=float32)
y
(azimuth, range)
float32
150.0 300.0 ... 1.492e+05 1.493e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 149.9931 , 299.98618, 449.97922, ..., 149054.33 , 149204.2 , 149354.11 ], [ 149.98012, 299.9602 , 449.94028, ..., 149041.16 , 149191.06 , 149340.92 ], [ 149.94171, 299.8834 , 449.825 , ..., 149003.25 , 149153.08 , 149302.94 ], ..., [ 149.87732, 299.7546 , 449.6319 , ..., 148939. , 149088.81 , 149238.56 ], [ 149.94157, 299.88312, 449.82462, ..., 149002.84 , 149152.72 , 149302.55 ], [ 149.98012, 299.9602 , 449.94028, ..., 149041.16 , 149191.06 , 149340.92 ]], dtype=float32)
z
(azimuth, range)
float32
46.0 47.0 ... 2.714e+03 2.718e+03
standard_name :
height_above_ground
units :
meters
array([[ 46., 47., 48., ..., 2695., 2700., 2704.], [ 46., 47., 48., ..., 2710., 2714., 2718.], [ 46., 47., 48., ..., 2695., 2700., 2704.], ..., [ 46., 47., 48., ..., 2710., 2714., 2718.], [ 46., 47., 48., ..., 2710., 2714., 2718.], [ 46., 47., 48., ..., 2710., 2714., 2718.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 1.104 1.104 ... 1.104 1.104 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.954e+03 y (azimuth, range) float32 2MB 150.0 ... 1.493e+05 z (azimuth, range) float32 2MB 47.0 ... 4.235e+03 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_1
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:16:21 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000', ..., '2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
1.104 1.104 1.104 ... 1.104 1.104
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([1.1041, 1.1041, 1.1041, ..., 1.1041, 1.1041, 1.1041], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.952e+03 -1.954e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9630642e+00, 3.9261267e+00, 5.8891883e+00, ..., 1.9504271e+03, 1.9523879e+03, 1.9543495e+03], [ 3.9257920e+00, 7.8515806e+00, 1.1777368e+01, ..., 3.9005203e+03, 3.9044414e+03, 3.9083643e+03], ..., [-5.8878231e+00, -1.1775641e+01, -1.7663456e+01, ..., -5.8499209e+03, -5.8558018e+03, -5.8616851e+03], [-3.9258146e+00, -7.8516259e+00, -1.1777435e+01, ..., -3.9005427e+03, -3.9044639e+03, -3.9083867e+03], [-1.9630625e+00, -3.9261234e+00, -5.8891830e+00, ..., -1.9504255e+03, -1.9523862e+03, -1.9543479e+03]], dtype=float32)
y
(azimuth, range)
float32
150.0 299.9 ... 1.491e+05 1.493e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 149.97133, 299.94254, 449.91367, ..., 149005.9 , 149155.7 , 149305.56 ], [ 149.95848, 299.91684, 449.87512, ..., 148993.14 , 149142.92 , 149292.78 ], [ 149.91994, 299.83975, 449.7595 , ..., 148954.84 , 149104.6 , 149254.4 ], ..., [ 149.8557 , 299.71127, 449.5668 , ..., 148891.03 , 149040.7 , 149190.45 ], [ 149.91994, 299.83975, 449.7595 , ..., 148954.84 , 149104.6 , 149254.4 ], [ 149.95848, 299.91684, 449.87512, ..., 148993.14 , 149142.92 , 149292.78 ]], dtype=float32)
z
(azimuth, range)
float32
47.0 50.0 ... 4.23e+03 4.235e+03
standard_name :
height_above_ground
units :
meters
array([[ 47., 50., 53., ..., 4224., 4230., 4235.], [ 47., 50., 53., ..., 4224., 4230., 4235.], [ 47., 50., 53., ..., 4224., 4230., 4235.], ..., [ 47., 50., 53., ..., 4224., 4230., 4235.], [ 47., 50., 53., ..., 4224., 4230., 4235.], [ 47., 50., 53., ..., 4224., 4230., 4235.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 1.796 1.796 ... 1.796 1.796 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.953e+03 y (azimuth, range) float32 2MB 149.9 ... 1.492e+05 z (azimuth, range) float32 2MB 49.0 ... 6.038e+03 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 482B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_2
Groups: (0)
Dimensions:
azimuth: 482
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:17:07 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:17:07.000000000', '2008-06-04T00:17:08.000000000', '2008-06-04T00:17:08.000000000', ..., '2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
1.796 1.796 1.796 ... 1.796 1.796
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([1.7963, 1.7963, 1.7963, ..., 1.7963, 1.7963, 1.7963], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.951e+03 -1.953e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9624634e+00, 3.9249244e+00, 5.8873830e+00, ..., 1.9494178e+03, 1.9513781e+03, 1.9533374e+03], [ 3.9245906e+00, 7.8491764e+00, 1.1773758e+01, ..., 3.8985017e+03, 3.9024216e+03, 3.9063401e+03], ..., [-5.8860211e+00, -1.1772035e+01, -1.7658043e+01, ..., -5.8468936e+03, -5.8527725e+03, -5.8586494e+03], [-3.9246130e+00, -7.8492212e+00, -1.1773826e+01, ..., -3.8985242e+03, -3.9024441e+03, -3.9063625e+03], [-1.9624617e+00, -3.9249210e+00, -5.8873782e+00, ..., -1.9494161e+03, -1.9513763e+03, -1.9533357e+03]], dtype=float32)
y
(azimuth, range)
float32
149.9 299.9 ... 1.491e+05 1.492e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 149.92543, 299.85068, 449.77576, ..., 148928.8 , 149078.55 , 149228.23 ], [ 149.91258, 299.82498, 449.73724, ..., 148916.05 , 149065.78 , 149215.45 ], [ 149.87405, 299.74792, 449.62164, ..., 148877.77 , 149027.47 , 149177.1 ], ..., [ 149.80984, 299.6195 , 449.429 , ..., 148813.97 , 148963.61 , 149113.19 ], [ 149.87405, 299.74792, 449.62164, ..., 148877.77 , 149027.47 , 149177.1 ], [ 149.91258, 299.82498, 449.73724, ..., 148916.05 , 149065.78 , 149215.45 ]], dtype=float32)
z
(azimuth, range)
float32
49.0 54.0 ... 6.031e+03 6.038e+03
standard_name :
height_above_ground
units :
meters
array([[ 49., 54., 59., ..., 6024., 6031., 6038.], [ 49., 54., 59., ..., 6024., 6031., 6038.], [ 49., 54., 59., ..., 6024., 6031., 6038.], ..., [ 49., 54., 59., ..., 6024., 6031., 6038.], [ 49., 54., 59., ..., 6024., 6031., 6038.], [ 49., 54., 59., ..., 6024., 6031., 6038.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 2.598 2.598 ... 2.598 2.598 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.952e+03 y (azimuth, range) float32 2MB 149.8 ... 1.491e+05 z (azimuth, range) float32 2MB 51.0 ... 8.126e+03 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_3
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:17:54 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:55.000000000', ..., '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
2.598 2.598 2.598 ... 2.598 2.598
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([2.5983, 2.5983, 2.5983, ..., 2.5983, 2.5983, 2.5983], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.95e+03 -1.952e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9614093e+00, 3.9228151e+00, 5.8842182e+00, ..., 1.9478942e+03, 1.9498518e+03, 1.9518093e+03], [ 3.9224827e+00, 7.8449583e+00, 1.1767428e+01, ..., 3.8954546e+03, 3.8993696e+03, 3.9032842e+03], ..., [-5.8828597e+00, -1.1765709e+01, -1.7648550e+01, ..., -5.8423232e+03, -5.8481953e+03, -5.8540664e+03], [-3.9225054e+00, -7.8450036e+00, -1.1767496e+01, ..., -3.8954771e+03, -3.8993921e+03, -3.9033069e+03], [-1.9614077e+00, -3.9228117e+00, -5.8842130e+00, ..., -1.9478925e+03, -1.9498502e+03, -1.9518076e+03]], dtype=float32)
y
(azimuth, range)
float32
149.8 299.7 ... 1.489e+05 1.491e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 149.84491, 299.68954, 449.53397, ..., 148812.39 , 148961.95 , 149111.5 ], [ 149.83208, 299.66388, 449.49545, ..., 148799.64 , 148949.19 , 149098.73 ], [ 149.79356, 299.58685, 449.3799 , ..., 148761.39 , 148910.9 , 149060.4 ], ..., [ 149.72939, 299.4585 , 449.18738, ..., 148697.66 , 148847.11 , 148996.53 ], [ 149.79356, 299.58685, 449.3799 , ..., 148761.39 , 148910.9 , 149060.4 ], [ 149.83208, 299.66388, 449.49545, ..., 148799.64 , 148949.19 , 149098.73 ]], dtype=float32)
z
(azimuth, range)
float32
51.0 58.0 ... 8.117e+03 8.126e+03
standard_name :
height_above_ground
units :
meters
array([[ 51., 58., 65., ..., 8107., 8117., 8126.], [ 51., 58., 65., ..., 8107., 8117., 8126.], [ 51., 58., 65., ..., 8107., 8117., 8126.], ..., [ 51., 58., 65., ..., 8107., 8117., 8126.], [ 51., 58., 65., ..., 8107., 8117., 8126.], [ 51., 58., 65., ..., 8107., 8117., 8126.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 481, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 3.598 3.598 ... 3.598 3.598 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.949e+03 y (azimuth, range) float32 2MB 149.7 ... 1.489e+05 z (azimuth, range) float32 2MB 54.0 ... 1.073e+04 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 481B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_4
Groups: (0)
Dimensions:
azimuth: 481
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:18:41 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000', ..., '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
3.598 3.598 3.598 ... 3.598 3.598
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([3.5981, 3.5981, 3.5981, ..., 3.5981, 3.5981, 3.5981], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.947e+03 -1.949e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9595567e+00, 3.9191089e+00, 5.8786578e+00, ..., 1.9454611e+03, 1.9474164e+03, 1.9493706e+03], [ 3.9187777e+00, 7.8375463e+00, 1.1756308e+01, ..., 3.8905889e+03, 3.8944990e+03, 3.8984072e+03], ..., [-5.8773031e+00, -1.1754593e+01, -1.7631872e+01, ..., -5.8350259e+03, -5.8408906e+03, -5.8467520e+03], [-3.9188001e+00, -7.8375916e+00, -1.1756376e+01, ..., -3.8906113e+03, -3.8945215e+03, -3.8984297e+03], [-1.9595550e+00, -3.9191055e+00, -5.8786526e+00, ..., -1.9454595e+03, -1.9474147e+03, -1.9493689e+03]], dtype=float32)
y
(azimuth, range)
float32
149.7 299.4 ... 1.488e+05 1.489e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 149.70337, 299.4064 , 449.10916, ..., 148626.52 , 148775.89 , 148925.19 ], [ 149.69055, 299.38077, 449.0707 , ..., 148613.78 , 148763.14 , 148912.44 ], [ 149.65207, 299.3038 , 448.95526, ..., 148575.6 , 148724.9 , 148874.16 ], ..., [ 149.58795, 299.17557, 448.7629 , ..., 148511.92 , 148661.19 , 148810.38 ], [ 149.65207, 299.3038 , 448.95526, ..., 148575.6 , 148724.9 , 148874.16 ], [ 149.69055, 299.38077, 449.0707 , ..., 148613.78 , 148763.14 , 148912.44 ]], dtype=float32)
z
(azimuth, range)
float32
54.0 63.0 ... 1.071e+04 1.073e+04
standard_name :
height_above_ground
units :
meters
array([[ 54., 63., 73., ..., 10703., 10714., 10727.], [ 54., 63., 73., ..., 10703., 10714., 10727.], [ 54., 63., 73., ..., 10703., 10714., 10727.], ..., [ 54., 63., 73., ..., 10703., 10714., 10727.], [ 54., 63., 73., ..., 10703., 10714., 10727.], [ 54., 63., 73., ..., 10703., 10714., 10727.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 4.708 4.708 ... 4.708 4.708 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.946e+03 y (azimuth, range) float32 2MB 149.5 ... 1.487e+05 z (azimuth, range) float32 2MB 57.0 ... 1.361e+04 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 482B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_5
Groups: (0)
Dimensions:
azimuth: 482
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:19:28 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000', ..., '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
4.708 4.708 4.708 ... 4.708 4.708
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([4.7077, 4.7077, 4.7077, ..., 4.7077, 4.7077, 4.7077], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.944e+03 -1.946e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9568024e+00, 3.9135993e+00, 5.8703914e+00, ..., 1.9420713e+03, 1.9440216e+03, 1.9459724e+03], [ 3.9132695e+00, 7.8265276e+00, 1.1739777e+01, ..., 3.8838098e+03, 3.8877102e+03, 3.8916113e+03], ..., [-5.8690419e+00, -1.1738068e+01, -1.7607079e+01, ..., -5.8248589e+03, -5.8307085e+03, -5.8365596e+03], [-3.9132919e+00, -7.8265729e+00, -1.1739844e+01, ..., -3.8838323e+03, -3.8877327e+03, -3.8916338e+03], [-1.9568007e+00, -3.9135959e+00, -5.8703861e+00, ..., -1.9420696e+03, -1.9440200e+03, -1.9459707e+03]], dtype=float32)
y
(azimuth, range)
float32
149.5 299.0 ... 1.485e+05 1.487e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 149.49295, 298.98547, 448.47763, ..., 148367.55 , 148516.55 , 148665.58 ], [ 149.48015, 298.95987, 448.4392 , ..., 148354.84 , 148503.83 , 148652.84 ], [ 149.44173, 298.88303, 448.32394, ..., 148316.7 , 148465.66 , 148614.64 ], ..., [ 149.3777 , 298.75497, 448.13187, ..., 148253.16 , 148402.05 , 148550.95 ], [ 149.44173, 298.88303, 448.32394, ..., 148316.7 , 148465.66 , 148614.64 ], [ 149.48015, 298.95987, 448.4392 , ..., 148354.84 , 148503.83 , 148652.84 ]], dtype=float32)
z
(azimuth, range)
float32
57.0 69.0 ... 1.359e+04 1.361e+04
standard_name :
height_above_ground
units :
meters
array([[ 57., 69., 81., ..., 13578., 13593., 13608.], [ 57., 69., 81., ..., 13578., 13593., 13608.], [ 57., 69., 81., ..., 13578., 13593., 13608.], ..., [ 57., 69., 81., ..., 13578., 13593., 13608.], [ 57., 69., 81., ..., 13578., 13593., 13608.], [ 57., 69., 81., ..., 13578., 13593., 13608.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 6.471 6.471 ... 6.471 6.471 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.939e+03 y (azimuth, range) float32 2MB 149.0 ... 1.481e+05 z (azimuth, range) float32 2MB 61.0 ... 1.818e+04 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 482B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_6
Groups: (0)
Dimensions:
azimuth: 482
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:20:15 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000', ..., '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
6.471 6.471 6.471 ... 6.471 6.471
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([6.471, 6.471, 6.471, ..., 6.471, 6.471, 6.471], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.937e+03 -1.939e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9509165e+00, 3.9018250e+00, 5.8527265e+00, ..., 1.9351935e+03, 1.9371364e+03, 1.9390789e+03], [ 3.9014988e+00, 7.8029814e+00, 1.1704451e+01, ..., 3.8700554e+03, 3.8739407e+03, 3.8778254e+03], ..., [-5.8513885e+00, -1.1702753e+01, -1.7554096e+01, ..., -5.8042305e+03, -5.8100576e+03, -5.8158838e+03], [-3.9015212e+00, -7.8030267e+00, -1.1704517e+01, ..., -3.8700779e+03, -3.8739631e+03, -3.8778479e+03], [-1.9509149e+00, -3.9018216e+00, -5.8527217e+00, ..., -1.9351919e+03, -1.9371346e+03, -1.9390773e+03]], dtype=float32)
y
(azimuth, range)
float32
149.0 298.1 ... 1.48e+05 1.481e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 149.04329, 298.08597, 447.1281 , ..., 147842.11 , 147990.53 , 148138.94 ], [ 149.03052, 298.06042, 447.0898 , ..., 147829.45 , 147977.86 , 148126.25 ], [ 148.99222, 297.98383, 446.97488, ..., 147791.45 , 147939.81 , 148088.17 ], ..., [ 148.92838, 297.85614, 446.7834 , ..., 147728.12 , 147876.44 , 148024.72 ], [ 148.99222, 297.98383, 446.97488, ..., 147791.45 , 147939.81 , 148088.17 ], [ 149.03052, 298.06042, 447.0898 , ..., 147829.45 , 147977.86 , 148126.25 ]], dtype=float32)
z
(azimuth, range)
float32
61.0 79.0 ... 1.816e+04 1.818e+04
standard_name :
height_above_ground
units :
meters
array([[ 61., 79., 95., ..., 18137., 18156., 18175.], [ 61., 79., 95., ..., 18137., 18156., 18175.], [ 61., 79., 95., ..., 18137., 18156., 18175.], ..., [ 61., 79., 95., ..., 18137., 18156., 18175.], [ 61., 79., 95., ..., 18137., 18156., 18175.], [ 61., 79., 95., ..., 18137., 18156., 18175.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 484, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 9.102 9.102 ... 9.102 9.102 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.925e+03 y (azimuth, range) float32 2MB 148.1 ... 1.471e+05 z (azimuth, range) float32 2MB 68.0 ... 2.496e+04 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 484B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_7
Groups: (0)
Dimensions:
azimuth: 484
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:21:02 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000', ..., '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
9.102 9.102 9.102 ... 9.102 9.102
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([9.1023, 9.1023, 9.1023, ..., 9.1023, 9.1023, 9.1023], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.923e+03 -1.925e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9386991e+00, 3.8773875e+00, 5.8160653e+00, ..., 1.9215487e+03, 1.9234758e+03, 1.9254036e+03], [ 3.8770661e+00, 7.7541108e+00, 1.1631134e+01, ..., 3.8427681e+03, 3.8466223e+03, 3.8504773e+03], ..., [-5.8147449e+00, -1.1629457e+01, -1.7444139e+01, ..., -5.7633052e+03, -5.7690859e+03, -5.7748672e+03], [-3.8770883e+00, -7.7541552e+00, -1.1631202e+01, ..., -3.8427903e+03, -3.8466443e+03, -3.8504993e+03], [-1.9386975e+00, -3.8773842e+00, -5.8160605e+00, ..., -1.9215470e+03, -1.9234742e+03, -1.9254019e+03]], dtype=float32)
y
(azimuth, range)
float32
148.1 296.2 ... 1.469e+05 1.471e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 148.10992, 296.21902, 444.32733, ..., 146799.69 , 146946.92 , 147094.19 ], [ 148.09724, 296.19366, 444.28928, ..., 146787.11 , 146934.33 , 147081.6 ], [ 148.05917, 296.11752, 444.17508, ..., 146749.39 , 146896.56 , 147043.78 ], ..., [ 147.99573, 295.99063, 443.98477, ..., 146686.5 , 146833.62 , 146980.78 ], [ 148.05917, 296.11752, 444.17508, ..., 146749.39 , 146896.56 , 147043.78 ], [ 148.09724, 296.19366, 444.28928, ..., 146787.11 , 146934.33 , 147081.6 ]], dtype=float32)
z
(azimuth, range)
float32
68.0 92.0 ... 2.493e+04 2.496e+04
standard_name :
height_above_ground
units :
meters
array([[ 68., 92., 116., ..., 24903., 24929., 24955.], [ 68., 92., 116., ..., 24903., 24929., 24955.], [ 68., 92., 116., ..., 24903., 24929., 24955.], ..., [ 68., 92., 116., ..., 24903., 24929., 24955.], [ 68., 92., 116., ..., 24903., 24929., 24955.], [ 68., 92., 116., ..., 24903., 24929., 24955.]], dtype=float32)
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: 10MB Dimensions: (azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 elevation (azimuth) float32 2kB 12.8 12.8 ... 12.79 12.8 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 latitude float64 8B 22.53 longitude float64 8B 120.4 altitude float64 8B 45.0 crs_wkt int64 8B 0 x (azimuth, range) float32 2MB 0.0 ... -1.899e+03 y (azimuth, range) float32 2MB 146.3 ... 1.451e+05 z (azimuth, range) float32 2MB 78.0 ... 3.439e+04 Data variables: (12/18) sweep_number int32 4B ... sweep_mode <U20 80B 'azimuth_surveillance' prt_mode |S32 32B ... follow_mode |S32 32B ... sweep_fixed_angle float32 4B ... pulse_width (azimuth) timedelta64[ns] 4kB ... ... ... r_calib_index (azimuth) int8 483B ... measured_transmit_power_h (azimuth) float32 2kB ... measured_transmit_power_v (azimuth) float32 2kB ... scan_rate (azimuth) float32 2kB ... DBZ (azimuth, range) float32 2MB ... VR (azimuth, range) float32 2MB ...
sweep_8
Groups: (0)
Dimensions:
azimuth: 483
range: 996
Coordinates: (11)
time
(azimuth)
datetime64[ns]
2008-06-04T00:21:49 ... 2008-06-...
standard_name :
time
long_name :
time in seconds since volume start
comment :
times are relative to the volume start_time
array(['2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000', ..., '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000'], dtype='datetime64[ns]')
range
(range)
float32
150.0 300.0 ... 1.492e+05 1.494e+05
standard_name :
range_to_center_of_measurement_volume
long_name :
Range from instrument to center of gate
units :
meters
spacing_is_constant :
true
meters_to_center_of_first_gate :
150.00000596046448
meters_between_gates :
150.00000596046448
array([ 150. , 300. , 450.00003, ..., 149100. , 149250. , 149400. ], dtype=float32)
elevation
(azimuth)
float32
12.8 12.8 12.8 ... 12.79 12.79 12.8
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
array([12.7993, 12.8048, 12.7993, ..., 12.7883, 12.7938, 12.7993], dtype=float32)
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)
latitude
()
float64
22.53
standard_name :
latitude
units :
degrees_north
array(22.526699)
longitude
()
float64
120.4
standard_name :
longitude
units :
degrees_east
array(120.433502)
altitude
()
float64
45.0
standard_name :
altitude
units :
meters
positive :
up
array(45.000002)
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
unknown
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
22.52669906616211
longitude_of_projection_origin :
120.43350219726562
false_easting :
0.0
false_northing :
0.0
array(0)
x
(azimuth, range)
float32
0.0 0.0 ... -1.898e+03 -1.899e+03
standard_name :
east_west_distance_from_radar
units :
meters
array([[ 0.0000000e+00, 0.0000000e+00, 0.0000000e+00, ..., 0.0000000e+00, 0.0000000e+00, 0.0000000e+00], [ 1.9145927e+00, 3.8291707e+00, 5.7437339e+00, ..., 1.8955592e+03, 1.8974585e+03, 1.8993579e+03], [ 3.8289409e+00, 7.6578522e+00, 1.1486733e+01, ..., 3.7908828e+03, 3.7946814e+03, 3.7984788e+03], ..., [-5.7428184e+00, -1.1485592e+01, -1.7228321e+01, ..., -5.6857554e+03, -5.6914521e+03, -5.6971479e+03], [-3.8290465e+00, -7.6580634e+00, -1.1487050e+01, ..., -3.7909939e+03, -3.7947917e+03, -3.7985898e+03], [-1.9146328e+00, -3.8292508e+00, -5.7438540e+00, ..., -1.8956022e+03, -1.8975016e+03, -1.8994004e+03]], dtype=float32)
y
(azimuth, range)
float32
146.3 292.5 ... 1.45e+05 1.451e+05
standard_name :
north_south_distance_from_radar
units :
meters
array([[ 146.27147, 292.5418 , 438.811 , ..., 144817.6 , 144962.7 , 145107.77 ], [ 146.25575, 292.51038, 438.76385, ..., 144801.78 , 144946.86 , 145091.97 ], [ 146.22134, 292.44156, 438.66064, ..., 144767.97 , 144913.03 , 145058.05 ], ..., [ 146.16507, 292.329 , 438.49182, ..., 144712.72 , 144857.72 , 145002.69 ], [ 146.22453, 292.44794, 438.6702 , ..., 144771.38 , 144916.4 , 145061.45 ], [ 146.25894, 292.51675, 438.7734 , ..., 144805.19 , 144950.28 , 145095.34 ]], dtype=float32)
z
(azimuth, range)
float32
78.0 111.0 ... 3.435e+04 3.439e+04
standard_name :
height_above_ground
units :
meters
array([[ 78., 111., 144., ..., 34314., 34350., 34386.], [ 78., 111., 144., ..., 34328., 34364., 34400.], [ 78., 111., 144., ..., 34314., 34350., 34386.], ..., [ 78., 111., 144., ..., 34287., 34322., 34358.], [ 78., 111., 144., ..., 34300., 34336., 34372.], [ 78., 111., 144., ..., 34314., 34350., 34386.]], dtype=float32)
Data variables: (18)
sweep_number
()
int32
...
standard_name :
sweep_index_number_0_based
[1 values with dtype=int32]
sweep_mode
()
<U20
'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20')
prt_mode
()
|S32
...
standard_name :
transmit_pulse_mode
options :
fixed, staggered, dual
meta_group :
radar_parameters
[1 values with dtype=|S32]
follow_mode
()
|S32
...
standard_name :
follow_mode_for_scan_strategy
options :
none, sun, vehicle, aircraft, target, manual
meta_group :
instrument_parameters
[1 values with dtype=|S32]
sweep_fixed_angle
()
float32
...
standard_name :
beam_target_fixed_angle
units :
degrees
[1 values with dtype=float32]
pulse_width
(azimuth)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
nyquist_velocity
(azimuth)
float32
...
standard_name :
unambiguous_doppler_velocity
units :
meters per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
unambiguous_range
(azimuth)
float32
...
standard_name :
unambiguous_range
units :
meters
meta_group :
instrument_parameters
[483 values with dtype=float32]
antenna_transition
(azimuth)
int8
...
standard_name :
antenna_is_in_transition_between_sweeps
comment :
1 if antenna is in transition, 0 otherwise
[483 values with dtype=int8]
n_samples
(azimuth)
int32
...
standard_name :
number_of_samples_used_to_compute_moments
meta_group :
instrument_parameters
[483 values with dtype=int32]
r_calib_index
(azimuth)
int8
...
standard_name :
calibration_data_array_index_per_ray
meta_group :
radar_calibration
comment :
This is the index for the calibration which applies to this ray
[483 values with dtype=int8]
measured_transmit_power_h
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_h_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
measured_transmit_power_v
(azimuth)
float32
...
standard_name :
measured_radar_transmit_power_v_channel
units :
dBm
meta_group :
radar_parameters
[483 values with dtype=float32]
scan_rate
(azimuth)
float32
...
standard_name :
antenna_angle_scan_rate
units :
degrees per second
meta_group :
instrument_parameters
[483 values with dtype=float32]
DBZ
(azimuth, range)
float32
...
long_name :
Computed Horizontal Co-polar Reflectivit
standard_name :
equivalent_reflectivity_factor
units :
dBZ
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
VR
(azimuth, range)
float32
...
long_name :
Computed Velocity
standard_name :
radial_velocity_of_scatterers_away_from_instrument
units :
m/s
threshold_field_name :
threshold_value :
-9999.0
sampling_ratio :
1.0
grid_mapping :
grid_mapping
[481068 values with dtype=float32]
Attributes: (0)
Dimensions:
- sweep: 9
Coordinates: (0)
Data variables: (12)
- volume_number
  ()
  int32
  ...
  standard_name :
  data_volume_index_number
```
[1 values with dtype=int32]
```
- platform_type
  ()
  |S32
  ...
  standard_name :
  platform_type
  options :
  fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat
```
[1 values with dtype=|S32]
```
- primary_axis
  ()
  |S32
  ...
  standard_name :
  primary_axis_of_rotation
  options :
  axis_z, axis_y, axis_x
```
[1 values with dtype=|S32]
```
- status_str
  ()
  |S1
  ...
  standard_name :
  status_xml
```
[1 values with dtype=|S1]
```
- instrument_type
  ()
  |S32
  ...
  standard_name :
  type_of_instrument
  options :
  radar, lidar
  meta_group :
  instrument_parameters
```
[1 values with dtype=|S32]
```
- time_coverage_start
  ()
  |S32
  ...
  standard_name :
  data_volume_start_time_utc
  comment :
  ray times are relative to start time in secs
```
[1 values with dtype=|S32]
```
- time_coverage_end
  ()
  |S32
  ...
  standard_name :
  data_volume_end_time_utc
```
[1 values with dtype=|S32]
```
- latitude
  ()
  float64
  ...
  standard_name :
  latitude
  units :
  degrees_north
```
[1 values with dtype=float64]
```
- longitude
  ()
  float64
  ...
  standard_name :
  longitude
  units :
  degrees_east
```
[1 values with dtype=float64]
```
- altitude
  ()
  float64
  ...
  standard_name :
  altitude
  units :
  meters
  positive :
  up
```
[1 values with dtype=float64]
```
- sweep_group_name
  (sweep)
  <U7
  'sweep_0' 'sweep_1' ... 'sweep_8'
```
array(['sweep_0', 'sweep_1', 'sweep_2', 'sweep_3', 'sweep_4', 'sweep_5',
       'sweep_6', 'sweep_7', 'sweep_8'], dtype='<U7')
```
- sweep_fixed_angle
  (sweep)
  float32
  ...
  standard_name :
  beam_target_fixed_angle
  units :
  degrees
```
[9 values with dtype=float32]
```
Attributes: (13)
Conventions :
CF/Radial instrument_parameters radar_parameters radar_calibration geometry_correction
version :
1.2
title :
TIMREX
institution :
references :
source :
history :
comment :
instrument_name :
SPOLRVP8
site_name :
scan_name :
scan_id :
0
platform_is_mobile :
false

Please observe, that the additional coordinates x, y, z have been added to the dataset. This will also add spatial_ref CRS information on the used Azimuthal Equidistant Projection.

[6]:

radar["sweep_0"]

[6]:

<xarray.DatasetView> Size: 10MB
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
    elevation                  (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219
  * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
    latitude                   float64 8B 22.53
    longitude                  float64 8B 120.4
    altitude                   float64 8B 45.0
    crs_wkt                    int64 8B 0
    x                          (azimuth, range) float32 2MB 0.0 ... -1.955e+03
    y                          (azimuth, range) float32 2MB 150.0 ... 1.493e+05
    z                          (azimuth, range) float32 2MB 46.0 ... 2.718e+03
Data variables: (12/18)
    sweep_number               int32 4B ...
    sweep_mode                 <U20 80B 'azimuth_surveillance'
    prt_mode                   |S32 32B ...
    follow_mode                |S32 32B ...
    sweep_fixed_angle          float32 4B ...
    pulse_width                (azimuth) timedelta64[ns] 4kB ...
    ...                         ...
    r_calib_index              (azimuth) int8 483B ...
    measured_transmit_power_h  (azimuth) float32 2kB ...
    measured_transmit_power_v  (azimuth) float32 2kB ...
    scan_rate                  (azimuth) float32 2kB ...
    DBZ                        (azimuth, range) float32 2MB ...
    VR                         (azimuth, range) float32 2MB ...

datatree.DataTree

Groups: (0)
Dimensions:
- azimuth: 483
- range: 996
Coordinates: (11)
- time
  (azimuth)
  datetime64[ns]
  2008-06-04T00:15:34 ... 2008-06-...
  standard_name :
  time
  long_name :
  time in seconds since volume start
  comment :
  times are relative to the volume start_time
```
array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000',
       '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000',
       '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],
      dtype='datetime64[ns]')
```
- range
  (range)
  float32
  150.0 300.0 ... 1.492e+05 1.494e+05
  standard_name :
  range_to_center_of_measurement_volume
  long_name :
  Range from instrument to center of gate
  units :
  meters
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  150.00000596046448
  meters_between_gates :
  150.00000596046448
```
array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
       149250.     , 149400.     ], dtype=float32)
```
- elevation
  (azimuth)
  float32
  0.5164 0.5219 ... 0.5219 0.5219
  standard_name :
  beam_elevation_angle
  units :
  degrees
  positive :
  up
```
array([0.5164, 0.5219, 0.5164, ..., 0.5219, 0.5219, 0.5219], dtype=float32)
```
- 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)
```
- latitude
  ()
  float64
  22.53
  standard_name :
  latitude
  units :
  degrees_north
```
array(22.526699)
```
- longitude
  ()
  float64
  120.4
  standard_name :
  longitude
  units :
  degrees_east
```
array(120.433502)
```
- altitude
  ()
  float64
  45.0
  standard_name :
  altitude
  units :
  meters
  positive :
  up
```
array(45.000002)
```
- crs_wkt
  ()
  int64
  0
  crs_wkt :
  PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
  semi_major_axis :
  6378137.0
  semi_minor_axis :
  6356752.314245179
  inverse_flattening :
  298.257223563
  reference_ellipsoid_name :
  WGS 84
  longitude_of_prime_meridian :
  0.0
  prime_meridian_name :
  Greenwich
  geographic_crs_name :
  unknown
  horizontal_datum_name :
  World Geodetic System 1984
  projected_crs_name :
  unknown
  grid_mapping_name :
  azimuthal_equidistant
  latitude_of_projection_origin :
  22.52669906616211
  longitude_of_projection_origin :
  120.43350219726562
  false_easting :
  0.0
  false_northing :
  0.0
```
array(0)
```
- x
  (azimuth, range)
  float32
  0.0 0.0 ... -1.953e+03 -1.955e+03
  standard_name :
  east_west_distance_from_radar
  units :
  meters
```
array([[ 0.0000000e+00,  0.0000000e+00,  0.0000000e+00, ...,
         0.0000000e+00,  0.0000000e+00,  0.0000000e+00],
       [ 1.9633473e+00,  3.9266944e+00,  5.8900409e+00, ...,
         1.9510557e+03,  1.9530181e+03,  1.9549799e+03],
       [ 3.9263620e+00,  7.8527231e+00,  1.1779083e+01, ...,
         3.9017876e+03,  3.9057109e+03,  3.9096350e+03],
       ...,
       [-5.8886724e+00, -1.1777344e+01, -1.7666014e+01, ...,
        -5.8518057e+03, -5.8576919e+03, -5.8635757e+03],
       [-3.9263809e+00, -7.8527613e+00, -1.1779141e+01, ...,
        -3.9017996e+03, -3.9057241e+03, -3.9096475e+03],
       [-1.9633456e+00, -3.9266911e+00, -5.8900361e+00, ...,
        -1.9510540e+03, -1.9530164e+03, -1.9549783e+03]], dtype=float32)
```
- y
  (azimuth, range)
  float32
  150.0 300.0 ... 1.492e+05 1.493e+05
  standard_name :
  north_south_distance_from_radar
  units :
  meters
```
array([[   149.9931 ,    299.98618,    449.97922, ..., 149054.33   ,
        149204.2    , 149354.11   ],
       [   149.98012,    299.9602 ,    449.94028, ..., 149041.16   ,
        149191.06   , 149340.92   ],
       [   149.94171,    299.8834 ,    449.825  , ..., 149003.25   ,
        149153.08   , 149302.94   ],
       ...,
       [   149.87732,    299.7546 ,    449.6319 , ..., 148939.     ,
        149088.81   , 149238.56   ],
       [   149.94157,    299.88312,    449.82462, ..., 149002.84   ,
        149152.72   , 149302.55   ],
       [   149.98012,    299.9602 ,    449.94028, ..., 149041.16   ,
        149191.06   , 149340.92   ]], dtype=float32)
```
- z
  (azimuth, range)
  float32
  46.0 47.0 ... 2.714e+03 2.718e+03
  standard_name :
  height_above_ground
  units :
  meters
```
array([[  46.,   47.,   48., ..., 2695., 2700., 2704.],
       [  46.,   47.,   48., ..., 2710., 2714., 2718.],
       [  46.,   47.,   48., ..., 2695., 2700., 2704.],
       ...,
       [  46.,   47.,   48., ..., 2710., 2714., 2718.],
       [  46.,   47.,   48., ..., 2710., 2714., 2718.],
       [  46.,   47.,   48., ..., 2710., 2714., 2718.]], dtype=float32)
```
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)

Use the Function#

We can also use the function xd.geoference.get_x_y_z_tree function if you prefer that method.

[7]:

radar = xd.georeference.get_x_y_z_tree(radar)
display(radar["sweep_0"])

<xarray.DatasetView> Size: 10MB
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
    elevation                  (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219
  * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
    latitude                   float64 8B 22.53
    longitude                  float64 8B 120.4
    altitude                   float64 8B 45.0
    crs_wkt                    int64 8B 0
    x                          (azimuth, range) float32 2MB 0.0 ... -1.955e+03
    y                          (azimuth, range) float32 2MB 150.0 ... 1.493e+05
    z                          (azimuth, range) float32 2MB 46.0 ... 2.718e+03
Data variables: (12/18)
    sweep_number               int32 4B ...
    sweep_mode                 <U20 80B 'azimuth_surveillance'
    prt_mode                   |S32 32B ...
    follow_mode                |S32 32B ...
    sweep_fixed_angle          float32 4B ...
    pulse_width                (azimuth) timedelta64[ns] 4kB ...
    ...                         ...
    r_calib_index              (azimuth) int8 483B ...
    measured_transmit_power_h  (azimuth) float32 2kB ...
    measured_transmit_power_v  (azimuth) float32 2kB ...
    scan_rate                  (azimuth) float32 2kB ...
    DBZ                        (azimuth, range) float32 2MB ...
    VR                         (azimuth, range) float32 2MB ...

datatree.DataTree

Groups: (0)
Dimensions:
- azimuth: 483
- range: 996
Coordinates: (11)
- time
  (azimuth)
  datetime64[ns]
  2008-06-04T00:15:34 ... 2008-06-...
  standard_name :
  time
  long_name :
  time in seconds since volume start
  comment :
  times are relative to the volume start_time
```
array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000',
       '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000',
       '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],
      dtype='datetime64[ns]')
```
- range
  (range)
  float32
  150.0 300.0 ... 1.492e+05 1.494e+05
  standard_name :
  range_to_center_of_measurement_volume
  long_name :
  Range from instrument to center of gate
  units :
  meters
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  150.00000596046448
  meters_between_gates :
  150.00000596046448
```
array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
       149250.     , 149400.     ], dtype=float32)
```
- elevation
  (azimuth)
  float32
  0.5164 0.5219 ... 0.5219 0.5219
  standard_name :
  beam_elevation_angle
  units :
  degrees
  positive :
  up
```
array([0.5164, 0.5219, 0.5164, ..., 0.5219, 0.5219, 0.5219], dtype=float32)
```
- 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)
```
- latitude
  ()
  float64
  22.53
  standard_name :
  latitude
  units :
  degrees_north
```
array(22.526699)
```
- longitude
  ()
  float64
  120.4
  standard_name :
  longitude
  units :
  degrees_east
```
array(120.433502)
```
- altitude
  ()
  float64
  45.0
  standard_name :
  altitude
  units :
  meters
  positive :
  up
```
array(45.000002)
```
- crs_wkt
  ()
  int64
  0
  crs_wkt :
  PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Modified Azimuthal Equidistant",ID["EPSG",9832]],PARAMETER["Latitude of natural origin",22.5266990661621,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502197266,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
  semi_major_axis :
  6378137.0
  semi_minor_axis :
  6356752.314245179
  inverse_flattening :
  298.257223563
  reference_ellipsoid_name :
  WGS 84
  longitude_of_prime_meridian :
  0.0
  prime_meridian_name :
  Greenwich
  geographic_crs_name :
  unknown
  horizontal_datum_name :
  World Geodetic System 1984
  projected_crs_name :
  unknown
  grid_mapping_name :
  azimuthal_equidistant
  latitude_of_projection_origin :
  22.5266990661621
  longitude_of_projection_origin :
  120.433502197266
  false_easting :
  0.0
  false_northing :
  0.0
```
array(0)
```
- x
  (azimuth, range)
  float32
  0.0 0.0 ... -1.953e+03 -1.955e+03
  standard_name :
  east_west_distance_from_radar
  units :
  meters
```
array([[ 0.0000000e+00,  0.0000000e+00,  0.0000000e+00, ...,
         0.0000000e+00,  0.0000000e+00,  0.0000000e+00],
       [ 1.9633473e+00,  3.9266944e+00,  5.8900409e+00, ...,
         1.9510557e+03,  1.9530181e+03,  1.9549799e+03],
       [ 3.9263620e+00,  7.8527231e+00,  1.1779083e+01, ...,
         3.9017876e+03,  3.9057109e+03,  3.9096350e+03],
       ...,
       [-5.8886724e+00, -1.1777344e+01, -1.7666014e+01, ...,
        -5.8518057e+03, -5.8576919e+03, -5.8635757e+03],
       [-3.9263809e+00, -7.8527613e+00, -1.1779141e+01, ...,
        -3.9017996e+03, -3.9057241e+03, -3.9096475e+03],
       [-1.9633456e+00, -3.9266911e+00, -5.8900361e+00, ...,
        -1.9510540e+03, -1.9530164e+03, -1.9549783e+03]], dtype=float32)
```
- y
  (azimuth, range)
  float32
  150.0 300.0 ... 1.492e+05 1.493e+05
  standard_name :
  north_south_distance_from_radar
  units :
  meters
```
array([[   149.9931 ,    299.98618,    449.97922, ..., 149054.33   ,
        149204.2    , 149354.11   ],
       [   149.98012,    299.9602 ,    449.94028, ..., 149041.16   ,
        149191.06   , 149340.92   ],
       [   149.94171,    299.8834 ,    449.825  , ..., 149003.25   ,
        149153.08   , 149302.94   ],
       ...,
       [   149.87732,    299.7546 ,    449.6319 , ..., 148939.     ,
        149088.81   , 149238.56   ],
       [   149.94157,    299.88312,    449.82462, ..., 149002.84   ,
        149152.72   , 149302.55   ],
       [   149.98012,    299.9602 ,    449.94028, ..., 149041.16   ,
        149191.06   , 149340.92   ]], dtype=float32)
```
- z
  (azimuth, range)
  float32
  46.0 47.0 ... 2.714e+03 2.718e+03
  standard_name :
  height_above_ground
  units :
  meters
```
array([[  46.,   47.,   48., ..., 2695., 2700., 2704.],
       [  46.,   47.,   48., ..., 2710., 2714., 2718.],
       [  46.,   47.,   48., ..., 2695., 2700., 2704.],
       ...,
       [  46.,   47.,   48., ..., 2710., 2714., 2718.],
       [  46.,   47.,   48., ..., 2710., 2714., 2718.],
       [  46.,   47.,   48., ..., 2710., 2714., 2718.]], dtype=float32)
```
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)

Plot our Data#

Plot simple PPI#

Now, let’s create our PPI plot! We just use the newly created 2D-coordinates x and y to create a meshplot.

[8]:

radar["sweep_0"]["DBZ"].plot(x="x", y="y", cmap="ChaseSpectral")

[8]:

<matplotlib.collections.QuadMesh at 0x7f0d4e60c990>

Plot PPI on map with cartopy#

If you have cartopy installed, you can easily plot on maps. We first have to extract the CRS from the dataset and to wrap it in a cartopy.crs.Projection.

[9]:

proj_crs = xd.georeference.get_crs(radar["sweep_0"].ds)
cart_crs = cartopy.crs.Projection(proj_crs)

Second, we create a matplotlib GeoAxes and a nice map.

[10]:

fig = plt.figure(figsize=(10, 10))
ax = fig.add_subplot(111, projection=cartopy.crs.PlateCarree())
radar["sweep_0"]["DBZ"].plot(
    x="x",
    y="y",
    cmap="ChaseSpectral",
    transform=cart_crs,
    cbar_kwargs=dict(pad=0.075, shrink=0.75),
)
ax.coastlines()
ax.gridlines(draw_labels=True)

/home/docs/checkouts/readthedocs.org/user_builds/xradar/conda/latest/lib/python3.11/site-packages/cartopy/mpl/geoaxes.py:1781: UserWarning: The input coordinates to pcolormesh are interpreted as cell centers, but are not monotonically increasing or decreasing. This may lead to incorrectly calculated cell edges, in which case, please supply explicit cell edges to pcolormesh.
  result = super().pcolormesh(*args, **kwargs)

[10]:

<cartopy.mpl.gridliner.Gridliner at 0x7f0d4c96c450>