Attenuation correction module
Attenuation due to precipitation plays a major role in underestimating the precipitation. Therefore, an attenuation correction according to the ZPHI method (Testud et. al, 2001) is performed.
Now we start step by step with the attenuation correction for clutter corrected data of the weather radar FURUNO.
import wrainfo as wrf
At first, we have to import following packages.
[1]:
import datetime as dt
import wradlib as wrl
import warnings
warnings.filterwarnings('ignore')
For the individual steps of the clutter correction, see the Clutter detection module. We continue working with the created dataset at the end of the clutter correction.
Note
The functions work also for a xarray dataset which is linking over the time.
Phase processing
First of all, a phase processing has to be done with the phase_zphi function. Therefore, a binary array (True = rain, False = not-rain) rolling a range-long sum from PHIDP is generated. Afterwards the first occurrence of the maximum (from front and back) of PHIDP binary array is searched for. This gives the indices of the centers of the rolling window. Then min, max, median and mean of these are calculated. At least the true start and end indices of the phase PHIDP are calculated (+- half
window length).
[2]:
cphase = wrf.attenuation_corr.phase_zphi(ds_clutter_corr.PHIDP,
rng=1000.0,
start_range=0.0)
display(cphase)
<xarray.Dataset>
Dimensions: (azimuth: 720, range: 936)
Coordinates:
* azimuth (azimuth) float64 0.25 0.75 1.25 1.75 ... 358.8 359.2 359.8
elevation (azimuth) float64 0.5 0.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5 0.5
rtime (azimuth) datetime64[ns] 2022-02-16T13:45:28.941817600 ... ...
* range (range) float32 37.5 112.5 187.5 ... 7.009e+04 7.016e+04
time datetime64[ns] 2022-02-16T13:45:01
sweep_mode <U20 'azimuth_surveillance'
longitude float64 13.24
latitude float64 53.55
altitude float64 38.0
Data variables: (12/15)
phib (azimuth, range) float64 nan nan nan nan ... nan nan nan nan
offset float64 450.0
offset_idx int64 6
start_range (azimuth) float32 7.988e+03 7.838e+03 ... 7.988e+03 7.988e+03
stop_range (azimuth) float32 2.651e+04 2.621e+04 ... 2.689e+04 2.689e+04
first_min (azimuth) float32 32.34 32.34 36.56 ... 36.56 30.94 33.75
... ...
first_idx (azimuth) int64 106 104 106 105 105 ... 124 123 123 106 106
last_min (azimuth) float32 32.34 30.94 29.53 ... 36.56 35.16 33.75
last_max (azimuth) float32 47.81 43.59 43.59 45.0 ... 46.41 45.0 49.22
last_mean (azimuth) float32 37.87 35.46 35.76 ... 40.08 39.38 38.97
last_median (azimuth) float32 35.86 34.45 36.56 ... 39.38 39.38 38.67
last_idx (azimuth) int64 352 348 346 325 325 ... 366 357 357 357 357xarray.Dataset
- azimuth: 720
- range: 936
- azimuth(azimuth)float640.25 0.75 1.25 ... 359.2 359.8
- standard_name :
- ray_azimuth_angle
- long_name :
- azimuth_angle_from_true_north
- units :
- degrees
- axis :
- radial_azimuth_coordinate
- a1gate :
- 1
- angle_res :
- 0.5
array([2.5000e-01, 7.5000e-01, 1.2500e+00, ..., 3.5875e+02, 3.5925e+02, 3.5975e+02]) - elevation(azimuth)float640.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5
- standard_name :
- ray_elevation_angle
- long_name :
- elevation_angle_from_horizontal_plane
- units :
- degrees
- axis :
- radial_elevation_coordinate
array([0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, ... 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5]) - rtime(azimuth)datetime64[ns]2022-02-16T13:45:28.941817600 .....
- standard_name :
- time
array(['2022-02-16T13:45:28.941817600', '2022-02-16T13:45:28.980652544', '2022-02-16T13:45:01.019417600', '2022-02-16T13:45:01.058252544', '2022-02-16T13:45:01.097087744', '2022-02-16T13:45:01.135922688', '2022-02-16T13:45:01.174757632', '2022-02-16T13:45:01.213592832', '2022-02-16T13:45:01.252427776', '2022-02-16T13:45:01.291262976', '2022-02-16T13:45:01.330097920', '2022-02-16T13:45:01.368932864', '2022-02-16T13:45:01.407768064', '2022-02-16T13:45:01.446603008', '2022-02-16T13:45:01.485438208', '2022-02-16T13:45:01.524273152', '2022-02-16T13:45:01.563108096', '2022-02-16T13:45:01.601943296', '2022-02-16T13:45:01.640778240', '2022-02-16T13:45:01.679613440', '2022-02-16T13:45:01.718448384', '2022-02-16T13:45:01.757283328', '2022-02-16T13:45:01.796118528', '2022-02-16T13:45:01.834953472', '2022-02-16T13:45:01.873788672', '2022-02-16T13:45:01.912623616', '2022-02-16T13:45:01.951458816', '2022-02-16T13:45:01.990293760', '2022-02-16T13:45:02.029128704', '2022-02-16T13:45:02.067963904', '2022-02-16T13:45:02.106798848', '2022-02-16T13:45:02.145634048', '2022-02-16T13:45:02.184468992', '2022-02-16T13:45:02.223303936', '2022-02-16T13:45:02.262139136', '2022-02-16T13:45:02.300974080', '2022-02-16T13:45:02.339809280', '2022-02-16T13:45:02.378644224', '2022-02-16T13:45:02.417479168', '2022-02-16T13:45:02.456314368', ... '2022-02-16T13:45:27.466085632', '2022-02-16T13:45:27.504920832', '2022-02-16T13:45:27.543755776', '2022-02-16T13:45:27.582590720', '2022-02-16T13:45:27.621425920', '2022-02-16T13:45:27.660260864', '2022-02-16T13:45:27.699096064', '2022-02-16T13:45:27.737931008', '2022-02-16T13:45:27.776765952', '2022-02-16T13:45:27.815601152', '2022-02-16T13:45:27.854436096', '2022-02-16T13:45:27.893271296', '2022-02-16T13:45:27.932106240', '2022-02-16T13:45:27.970941184', '2022-02-16T13:45:28.009776384', '2022-02-16T13:45:28.048611328', '2022-02-16T13:45:28.087446528', '2022-02-16T13:45:28.126281472', '2022-02-16T13:45:28.165116672', '2022-02-16T13:45:28.203951616', '2022-02-16T13:45:28.242786560', '2022-02-16T13:45:28.281621760', '2022-02-16T13:45:28.320456704', '2022-02-16T13:45:28.359291904', '2022-02-16T13:45:28.398126848', '2022-02-16T13:45:28.436961792', '2022-02-16T13:45:28.475796992', '2022-02-16T13:45:28.514631936', '2022-02-16T13:45:28.553467136', '2022-02-16T13:45:28.592302080', '2022-02-16T13:45:28.631137024', '2022-02-16T13:45:28.669972224', '2022-02-16T13:45:28.708807168', '2022-02-16T13:45:28.747642368', '2022-02-16T13:45:28.786477312', '2022-02-16T13:45:28.825312256', '2022-02-16T13:45:28.864147456', '2022-02-16T13:45:28.902982400'], dtype='datetime64[ns]') - range(range)float3237.5 112.5 ... 7.009e+04 7.016e+04
- units :
- meters
- standard_name :
- projection_range_coordinate
- long_name :
- range_to_measurement_volume
- spacing_is_constant :
- true
- axis :
- radial_range_coordinate
- meters_to_center_of_first_gate :
- 37.5
- meters_between_gates :
- 75.0
array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], dtype=float32) - time()datetime64[ns]2022-02-16T13:45:01
- standard_name :
- time
array('2022-02-16T13:45:01.000000000', dtype='datetime64[ns]') - sweep_mode()<U20'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20') - longitude()float6413.24
- long_name :
- longitude
- units :
- degrees_east
- standard_name :
- longitude
array(13.24397)
- latitude()float6453.55
- long_name :
- latitude
- units :
- degrees_north
- positive :
- up
- standard_name :
- latitude
array(53.55478)
- altitude()float6438.0
- long_name :
- altitude
- units :
- meters
- standard_name :
- altitude
array(38.)
- phib(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], ..., [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan]]) - offset()float64450.0
array(450.)
- offset_idx()int646
array(6)
- start_range(azimuth)float327.988e+03 7.838e+03 ... 7.988e+03
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ZPHI - Method
In the zphi function the PHIDP is recalcuted and also the KDP. The specific attenuation (AH_ZPHI) is generated and can also be used for the precipitation estimation.
[3]:
ds_zphi=wrf.attenuation_corr.zphi(ds_clutter_corr.DBZH_no_clutter,
cphase=cphase,
alphax=0.28,
bx=0.78)
ds_zphi
[3]:
<xarray.Dataset>
Dimensions: (azimuth: 720, range: 936)
Coordinates:
* azimuth (azimuth) float64 0.25 0.75 1.25 1.75 ... 358.8 359.2 359.8
elevation (azimuth) float64 0.5 0.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5 0.5
rtime (azimuth) datetime64[ns] 2022-02-16T13:45:28.941817600 ... ...
* range (range) float32 37.5 112.5 187.5 ... 7.009e+04 7.016e+04
time datetime64[ns] 2022-02-16T13:45:01
sweep_mode <U20 'azimuth_surveillance'
longitude float64 13.24
latitude float64 53.55
altitude float64 38.0
Data variables:
PHIDP_RECALC (azimuth, range) float32 0.0 0.0 0.0 0.0 ... 0.0 0.0 0.0 0.0
AH_ZPHI (azimuth, range) float32 0.0 0.0 0.0 0.0 ... 0.0 0.0 0.0 0.0
KDP_RECALC (azimuth, range) float32 0.0 0.0 0.0 0.0 ... 0.0 0.0 0.0 0.0xarray.Dataset
- azimuth: 720
- range: 936
- azimuth(azimuth)float640.25 0.75 1.25 ... 359.2 359.8
- standard_name :
- ray_azimuth_angle
- long_name :
- azimuth_angle_from_true_north
- units :
- degrees
- axis :
- radial_azimuth_coordinate
- a1gate :
- 1
- angle_res :
- 0.5
array([2.5000e-01, 7.5000e-01, 1.2500e+00, ..., 3.5875e+02, 3.5925e+02, 3.5975e+02]) - elevation(azimuth)float640.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5
- standard_name :
- ray_elevation_angle
- long_name :
- elevation_angle_from_horizontal_plane
- units :
- degrees
- axis :
- radial_elevation_coordinate
array([0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, ... 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5]) - rtime(azimuth)datetime64[ns]2022-02-16T13:45:28.941817600 .....
- standard_name :
- time
array(['2022-02-16T13:45:28.941817600', '2022-02-16T13:45:28.980652544', '2022-02-16T13:45:01.019417600', '2022-02-16T13:45:01.058252544', '2022-02-16T13:45:01.097087744', '2022-02-16T13:45:01.135922688', '2022-02-16T13:45:01.174757632', '2022-02-16T13:45:01.213592832', '2022-02-16T13:45:01.252427776', '2022-02-16T13:45:01.291262976', '2022-02-16T13:45:01.330097920', '2022-02-16T13:45:01.368932864', '2022-02-16T13:45:01.407768064', '2022-02-16T13:45:01.446603008', '2022-02-16T13:45:01.485438208', '2022-02-16T13:45:01.524273152', '2022-02-16T13:45:01.563108096', '2022-02-16T13:45:01.601943296', '2022-02-16T13:45:01.640778240', '2022-02-16T13:45:01.679613440', '2022-02-16T13:45:01.718448384', '2022-02-16T13:45:01.757283328', '2022-02-16T13:45:01.796118528', '2022-02-16T13:45:01.834953472', '2022-02-16T13:45:01.873788672', '2022-02-16T13:45:01.912623616', '2022-02-16T13:45:01.951458816', '2022-02-16T13:45:01.990293760', '2022-02-16T13:45:02.029128704', '2022-02-16T13:45:02.067963904', '2022-02-16T13:45:02.106798848', '2022-02-16T13:45:02.145634048', '2022-02-16T13:45:02.184468992', '2022-02-16T13:45:02.223303936', '2022-02-16T13:45:02.262139136', '2022-02-16T13:45:02.300974080', '2022-02-16T13:45:02.339809280', '2022-02-16T13:45:02.378644224', '2022-02-16T13:45:02.417479168', '2022-02-16T13:45:02.456314368', ... '2022-02-16T13:45:27.466085632', '2022-02-16T13:45:27.504920832', '2022-02-16T13:45:27.543755776', '2022-02-16T13:45:27.582590720', '2022-02-16T13:45:27.621425920', '2022-02-16T13:45:27.660260864', '2022-02-16T13:45:27.699096064', '2022-02-16T13:45:27.737931008', '2022-02-16T13:45:27.776765952', '2022-02-16T13:45:27.815601152', '2022-02-16T13:45:27.854436096', '2022-02-16T13:45:27.893271296', '2022-02-16T13:45:27.932106240', '2022-02-16T13:45:27.970941184', '2022-02-16T13:45:28.009776384', '2022-02-16T13:45:28.048611328', '2022-02-16T13:45:28.087446528', '2022-02-16T13:45:28.126281472', '2022-02-16T13:45:28.165116672', '2022-02-16T13:45:28.203951616', '2022-02-16T13:45:28.242786560', '2022-02-16T13:45:28.281621760', '2022-02-16T13:45:28.320456704', '2022-02-16T13:45:28.359291904', '2022-02-16T13:45:28.398126848', '2022-02-16T13:45:28.436961792', '2022-02-16T13:45:28.475796992', '2022-02-16T13:45:28.514631936', '2022-02-16T13:45:28.553467136', '2022-02-16T13:45:28.592302080', '2022-02-16T13:45:28.631137024', '2022-02-16T13:45:28.669972224', '2022-02-16T13:45:28.708807168', '2022-02-16T13:45:28.747642368', '2022-02-16T13:45:28.786477312', '2022-02-16T13:45:28.825312256', '2022-02-16T13:45:28.864147456', '2022-02-16T13:45:28.902982400'], dtype='datetime64[ns]') - range(range)float3237.5 112.5 ... 7.009e+04 7.016e+04
- units :
- meters
- standard_name :
- projection_range_coordinate
- long_name :
- range_to_measurement_volume
- spacing_is_constant :
- true
- axis :
- radial_range_coordinate
- meters_to_center_of_first_gate :
- 37.5
- meters_between_gates :
- 75.0
array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], dtype=float32) - time()datetime64[ns]2022-02-16T13:45:01
- standard_name :
- time
array('2022-02-16T13:45:01.000000000', dtype='datetime64[ns]') - sweep_mode()<U20'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20') - longitude()float6413.24
- long_name :
- longitude
- units :
- degrees_east
- standard_name :
- longitude
array(13.24397)
- latitude()float6453.55
- long_name :
- latitude
- units :
- degrees_north
- positive :
- up
- standard_name :
- latitude
array(53.55478)
- altitude()float6438.0
- long_name :
- altitude
- units :
- meters
- standard_name :
- altitude
array(38.)
- PHIDP_RECALC(azimuth, range)float320.0 0.0 0.0 0.0 ... 0.0 0.0 0.0 0.0
- standard_name :
- radar_differential_phase_hv
- long_name :
- Differential phase HV
- short_name :
- PHIDP
- units :
- degrees
array([[0. , 0. , 0. , ..., 0. , 0. , 0. ], [0. , 0. , 0. , ..., 0. , 0. , 0. ], [0. , 0. , 0. , ..., 0. , 0. , 0. ], ..., [0. , 0. , 0. , ..., 0. , 0. , 0. ], [0. , 0. , 0. , ..., 1.4429669, 1.4429669, 1.4429669], [0. , 0. , 0. , ..., 0. , 0. , 0. ]], dtype=float32) - AH_ZPHI(azimuth, range)float320.0 0.0 0.0 0.0 ... 0.0 0.0 0.0 0.0
- units :
- dB/km
- standard_name :
- specific_attenuation_h
- long_name :
- Specific attenuation H
- short_name :
- AH
array([[0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.], ..., [0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.]], dtype=float32) - KDP_RECALC(azimuth, range)float320.0 0.0 0.0 0.0 ... 0.0 0.0 0.0 0.0
- standard_name :
- radar_specific_differential_phase_hv
- long_name :
- Specific differential phase HV
- short_name :
- KDP
- units :
- degrees per kilometer
array([[0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.], ..., [0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.], [0., 0., 0., ..., 0., 0., 0.]], dtype=float32)
[4]:
import matplotlib.pyplot as plt
# plot PHIDP Recalc and PHIDP raw
# georefenced dataset for plot
ds_zphi_georef=ds_zphi.pipe(wrl.georef.georeference_dataset)
ds_clutter_corr_georef = ds_clutter_corr.pipe(wrl.georef.georeference_dataset)
# plot
fig = plt.figure(figsize=(14, 5))
# first subplot
ax1 = fig.add_subplot(121)
ds_clutter_corr_georef.PHIDP.plot(x="x", y="y", ax=ax1, vmin=0, vmax=40)
t = plt.title(r'Raw PHIDP')
t.set_y(1.1)
# second subplot
ax2 = fig.add_subplot(122)
ds_zphi_georef.PHIDP_RECALC.plot(x="x", y="y", ax=ax2)
t = plt.title(r'Recalculated PHIDP')
t.set_y(1.1)
Attenuation correction
Now, the attenuation correction can be done.
[5]:
zhcorr = ds_clutter_corr.DBZH_no_clutter + 0.28 * ds_zphi.PHIDP_RECALC
[6]:
ds_clutter_corr["DBZH_CORR"] = xr.DataArray(zhcorr,
dims=["azimuth", "range"],
attrs=ds_clutter_corr.DBZH.attrs)
[7]:
# smoothing of the dataset
ds_smooth = ds_clutter_corr.pad(azimuth=(3, 3),
mode="wrap").rolling(azimuth=7,
min_periods=3,
center=True).mean().isel(azimuth=slice(3, -3))
ds_smooth
[7]:
<xarray.Dataset>
Dimensions: (azimuth: 720, range: 936)
Coordinates: (12/15)
* azimuth (azimuth) float64 0.25 0.75 1.25 1.75 ... 358.8 359.2 359.8
elevation (azimuth) float64 0.5 0.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5
rtime (azimuth) datetime64[ns] 2022-02-16T13:45:28.941817600 ....
* range (range) float32 37.5 112.5 187.5 ... 7.009e+04 7.016e+04
time datetime64[ns] 2022-02-16T13:45:01
sweep_mode <U20 'azimuth_surveillance'
... ...
x (azimuth, range) float64 0.1636 0.4909 ... -305.8 -306.1
y (azimuth, range) float64 37.5 112.5 ... 7.008e+04 7.015e+04
z (azimuth, range) float64 38.3 38.95 39.61 ... 939.2 940.3
gr (azimuth, range) float64 37.5 112.5 ... 7.008e+04 7.015e+04
rays (azimuth, range) float64 0.25 0.25 0.25 ... 359.8 359.8
bins (azimuth, range) float32 37.5 112.5 ... 7.009e+04 7.016e+04
Data variables:
RATE (azimuth, range) float64 nan nan nan nan ... nan nan nan
DBZH (azimuth, range) float64 nan nan nan nan ... nan nan nan
VRAD (azimuth, range) float64 nan nan nan nan ... nan nan nan
ZDR (azimuth, range) float64 nan nan nan nan ... nan nan nan
KDP (azimuth, range) float64 nan nan nan nan ... nan nan nan
PHIDP (azimuth, range) float64 nan nan nan nan ... nan nan nan
RHOHV (azimuth, range) float64 nan nan nan nan ... nan nan nan
WRAD (azimuth, range) float64 nan nan nan nan ... nan nan nan
QC_INFO (azimuth, range) float64 nan nan nan nan ... nan nan nan
FUZZ (azimuth, range) float64 nan nan nan nan ... nan nan nan
DBZH_no_clutter (azimuth, range) float64 nan nan nan nan ... nan nan nan
DBZH_CORR (azimuth, range) float64 nan nan nan nan ... nan nan nan
Attributes:
fixed_angle: 0.5xarray.Dataset
- azimuth: 720
- range: 936
- azimuth(azimuth)float640.25 0.75 1.25 ... 359.2 359.8
array([2.5000e-01, 7.5000e-01, 1.2500e+00, ..., 3.5875e+02, 3.5925e+02, 3.5975e+02]) - elevation(azimuth)float640.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5
array([0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, ... 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5]) - rtime(azimuth)datetime64[ns]2022-02-16T13:45:28.941817600 .....
array(['2022-02-16T13:45:28.941817600', '2022-02-16T13:45:28.980652544', '2022-02-16T13:45:01.019417600', '2022-02-16T13:45:01.058252544', '2022-02-16T13:45:01.097087744', '2022-02-16T13:45:01.135922688', '2022-02-16T13:45:01.174757632', '2022-02-16T13:45:01.213592832', '2022-02-16T13:45:01.252427776', '2022-02-16T13:45:01.291262976', '2022-02-16T13:45:01.330097920', '2022-02-16T13:45:01.368932864', '2022-02-16T13:45:01.407768064', '2022-02-16T13:45:01.446603008', '2022-02-16T13:45:01.485438208', '2022-02-16T13:45:01.524273152', '2022-02-16T13:45:01.563108096', '2022-02-16T13:45:01.601943296', '2022-02-16T13:45:01.640778240', '2022-02-16T13:45:01.679613440', '2022-02-16T13:45:01.718448384', '2022-02-16T13:45:01.757283328', '2022-02-16T13:45:01.796118528', '2022-02-16T13:45:01.834953472', '2022-02-16T13:45:01.873788672', '2022-02-16T13:45:01.912623616', '2022-02-16T13:45:01.951458816', '2022-02-16T13:45:01.990293760', '2022-02-16T13:45:02.029128704', '2022-02-16T13:45:02.067963904', '2022-02-16T13:45:02.106798848', '2022-02-16T13:45:02.145634048', '2022-02-16T13:45:02.184468992', '2022-02-16T13:45:02.223303936', '2022-02-16T13:45:02.262139136', '2022-02-16T13:45:02.300974080', '2022-02-16T13:45:02.339809280', '2022-02-16T13:45:02.378644224', '2022-02-16T13:45:02.417479168', '2022-02-16T13:45:02.456314368', ... '2022-02-16T13:45:27.466085632', '2022-02-16T13:45:27.504920832', '2022-02-16T13:45:27.543755776', '2022-02-16T13:45:27.582590720', '2022-02-16T13:45:27.621425920', '2022-02-16T13:45:27.660260864', '2022-02-16T13:45:27.699096064', '2022-02-16T13:45:27.737931008', '2022-02-16T13:45:27.776765952', '2022-02-16T13:45:27.815601152', '2022-02-16T13:45:27.854436096', '2022-02-16T13:45:27.893271296', '2022-02-16T13:45:27.932106240', '2022-02-16T13:45:27.970941184', '2022-02-16T13:45:28.009776384', '2022-02-16T13:45:28.048611328', '2022-02-16T13:45:28.087446528', '2022-02-16T13:45:28.126281472', '2022-02-16T13:45:28.165116672', '2022-02-16T13:45:28.203951616', '2022-02-16T13:45:28.242786560', '2022-02-16T13:45:28.281621760', '2022-02-16T13:45:28.320456704', '2022-02-16T13:45:28.359291904', '2022-02-16T13:45:28.398126848', '2022-02-16T13:45:28.436961792', '2022-02-16T13:45:28.475796992', '2022-02-16T13:45:28.514631936', '2022-02-16T13:45:28.553467136', '2022-02-16T13:45:28.592302080', '2022-02-16T13:45:28.631137024', '2022-02-16T13:45:28.669972224', '2022-02-16T13:45:28.708807168', '2022-02-16T13:45:28.747642368', '2022-02-16T13:45:28.786477312', '2022-02-16T13:45:28.825312256', '2022-02-16T13:45:28.864147456', '2022-02-16T13:45:28.902982400'], dtype='datetime64[ns]') - range(range)float3237.5 112.5 ... 7.009e+04 7.016e+04
- units :
- meters
- standard_name :
- projection_range_coordinate
- long_name :
- range_to_measurement_volume
- spacing_is_constant :
- true
- axis :
- radial_range_coordinate
- meters_to_center_of_first_gate :
- 37.5
- meters_between_gates :
- 75.0
array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], dtype=float32) - time()datetime64[ns]2022-02-16T13:45:01
- standard_name :
- time
array('2022-02-16T13:45:01.000000000', dtype='datetime64[ns]') - sweep_mode()<U20'azimuth_surveillance'
array('azimuth_surveillance', dtype='<U20') - longitude()float6413.24
- long_name :
- longitude
- units :
- degrees_east
- standard_name :
- longitude
array(13.24397)
- latitude()float6453.55
- long_name :
- latitude
- units :
- degrees_north
- positive :
- up
- standard_name :
- latitude
array(53.55478)
- altitude()float6438.0
- long_name :
- altitude
- units :
- meters
- standard_name :
- altitude
array(38.)
- x(azimuth, range)float640.1636 0.4909 ... -305.8 -306.1
array([[ 1.63617129e-01, 4.90851351e-01, 8.18085521e-01, ..., 3.05444277e+02, 3.05771429e+02, 3.06098598e+02], [ 4.90838928e-01, 1.47251667e+00, 2.45419426e+00, ..., 9.16309571e+02, 9.17291001e+02, 9.18272484e+02], [ 8.18023348e-01, 2.45406985e+00, 4.09011611e+00, ..., 1.52710508e+03, 1.52874072e+03, 1.53037644e+03], ..., [-8.18023348e-01, -2.45406985e+00, -4.09011611e+00, ..., -1.52710508e+03, -1.52874072e+03, -1.53037644e+03], [-4.90838928e-01, -1.47251667e+00, -2.45419426e+00, ..., -9.16309571e+02, -9.17291001e+02, -9.18272484e+02], [-1.63617129e-01, -4.90851351e-01, -8.18085521e-01, ..., -3.05444277e+02, -3.05771429e+02, -3.06098598e+02]]) - y(azimuth, range)float6437.5 112.5 ... 7.008e+04 7.015e+04
array([[3.74980459e+01, 1.12494129e+02, 1.87490201e+02, ..., 7.00022276e+04, 7.00772048e+04, 7.01521860e+04], [3.74951903e+01, 1.12485562e+02, 1.87475923e+02, ..., 6.99968967e+04, 7.00718681e+04, 7.01468436e+04], [3.74894793e+01, 1.12468429e+02, 1.87447367e+02, ..., 6.99862352e+04, 7.00611952e+04, 7.01361593e+04], ..., [3.74894793e+01, 1.12468429e+02, 1.87447367e+02, ..., 6.99862352e+04, 7.00611952e+04, 7.01361593e+04], [3.74951903e+01, 1.12485562e+02, 1.87475923e+02, ..., 6.99968967e+04, 7.00718681e+04, 7.01468436e+04], [3.74980459e+01, 1.12494129e+02, 1.87490201e+02, ..., 7.00022276e+04, 7.00772048e+04, 7.01521860e+04]]) - z(azimuth, range)float6438.3 38.95 39.61 ... 939.2 940.3
array([[ 38.29707351, 38.95156364, 39.60605378, ..., 937.54351336, 939.18635562, 940.33497831], [ 38.29707351, 38.95156364, 39.60605378, ..., 937.54351336, 939.18635562, 940.33497831], [ 38.29707351, 38.95156364, 39.60605378, ..., 937.54351336, 939.18635562, 940.33497831], ..., [ 38.29707351, 38.95156364, 39.60605378, ..., 937.54351336, 939.18635562, 940.33497831], [ 38.29707351, 38.95156364, 39.60605378, ..., 937.54351336, 939.18635562, 940.33497831], [ 38.29707351, 38.95156364, 39.60605378, ..., 937.54351336, 939.18635562, 940.33497831]]) - gr(azimuth, range)float6437.5 112.5 ... 7.008e+04 7.015e+04
array([[3.74984029e+01, 1.12495200e+02, 1.87491986e+02, ..., 7.00028940e+04, 7.00778719e+04, 7.01528538e+04], [3.74984029e+01, 1.12495200e+02, 1.87491986e+02, ..., 7.00028940e+04, 7.00778719e+04, 7.01528538e+04], [3.74984029e+01, 1.12495200e+02, 1.87491986e+02, ..., 7.00028940e+04, 7.00778719e+04, 7.01528538e+04], ..., [3.74984029e+01, 1.12495200e+02, 1.87491986e+02, ..., 7.00028940e+04, 7.00778719e+04, 7.01528538e+04], [3.74984029e+01, 1.12495200e+02, 1.87491986e+02, ..., 7.00028940e+04, 7.00778719e+04, 7.01528538e+04], [3.74984029e+01, 1.12495200e+02, 1.87491986e+02, ..., 7.00028940e+04, 7.00778719e+04, 7.01528538e+04]]) - rays(azimuth, range)float640.25 0.25 0.25 ... 359.8 359.8
array([[2.5000e-01, 2.5000e-01, 2.5000e-01, ..., 2.5000e-01, 2.5000e-01, 2.5000e-01], [7.5000e-01, 7.5000e-01, 7.5000e-01, ..., 7.5000e-01, 7.5000e-01, 7.5000e-01], [1.2500e+00, 1.2500e+00, 1.2500e+00, ..., 1.2500e+00, 1.2500e+00, 1.2500e+00], ..., [3.5875e+02, 3.5875e+02, 3.5875e+02, ..., 3.5875e+02, 3.5875e+02, 3.5875e+02], [3.5925e+02, 3.5925e+02, 3.5925e+02, ..., 3.5925e+02, 3.5925e+02, 3.5925e+02], [3.5975e+02, 3.5975e+02, 3.5975e+02, ..., 3.5975e+02, 3.5975e+02, 3.5975e+02]]) - bins(azimuth, range)float3237.5 112.5 ... 7.009e+04 7.016e+04
array([[3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], ..., [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04], [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04, 7.01625e+04]], dtype=float32)
- RATE(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[nan, nan, nan, ..., 1., nan, nan], [nan, nan, nan, ..., 1., 1., 1.], [nan, nan, nan, ..., 1., 1., 1.], ..., [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan]]) - DBZH(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., 22.66666667, nan, nan], [ nan, nan, nan, ..., 23.125 , 22.83333333, 21.83333333], [ nan, nan, nan, ..., 23.3 , 22.83333333, 21.83333333], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]]) - VRAD(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., -0.66666667, nan, nan], [ nan, nan, nan, ..., -0.5 , -0.33333333, -0.33333333], [ nan, nan, nan, ..., -0.4 , -0.33333333, -0.33333333], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]]) - ZDR(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., -0.11784808, nan, nan], [ nan, nan, nan, ..., -0.04736209, -0.36726014, -0.56245208], [ nan, nan, nan, ..., 0.10553827, -0.36726014, -0.56245208], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]]) - KDP(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], ..., [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan]]) - PHIDP(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., 44.53125 , nan, nan], [ nan, nan, nan, ..., 43.2421875, 45.46875 , 50.15625 ], [ nan, nan, nan, ..., 42.1875 , 45.46875 , 50.15625 ], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]]) - RHOHV(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., 0.98438001, nan, nan], [ nan, nan, nan, ..., 0.98853004, 0.97442007, 0.92462007], [ nan, nan, nan, ..., 0.97209606, 0.97442007, 0.92462007], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]]) - WRAD(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., 3.08140628, nan, nan], [ nan, nan, nan, ..., 2.99812508, 2.88708337, 3.22020817], [ nan, nan, nan, ..., 2.98146877, 2.88708337, 3.22020817], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]]) - QC_INFO(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[nan, nan, nan, ..., 0., nan, nan], [nan, nan, nan, ..., 0., 0., 0.], [nan, nan, nan, ..., 0., 0., 0.], ..., [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan]]) - FUZZ(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[nan, nan, nan, ..., 0., nan, nan], [nan, nan, nan, ..., 0., 0., 0.], [nan, nan, nan, ..., 0., 0., 0.], ..., [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan]]) - DBZH_no_clutter(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., 22.66666667, nan, nan], [ nan, nan, nan, ..., 23.125 , 22.83333333, 21.83333333], [ nan, nan, nan, ..., 23.3 , 22.83333333, 21.83333333], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]]) - DBZH_CORR(azimuth, range)float64nan nan nan nan ... nan nan nan nan
array([[ nan, nan, nan, ..., 22.86532084, nan, nan], [ nan, nan, nan, ..., 23.32378387, 23.0983785 , 22.0983785 ], [ nan, nan, nan, ..., 23.4590271 , 23.0983785 , 22.0983785 ], ..., [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan], [ nan, nan, nan, ..., nan, nan, nan]])
- fixed_angle :
- 0.5
[8]:
# plot PHIDP Recalc and PHIDP raw
# georefenced dataset for plot
ds_smooth_georef=ds_smooth.pipe(wrl.georef.georeference_dataset)
# plot
fig = plt.figure(figsize=(14, 5))
# first subplot
ax1 = fig.add_subplot(121)
ds_smooth_georef.DBZH.plot(x="x", y="y", ax=ax1, cmap = "jet", vmin=0, vmax=40)
t = plt.title(r'Raw reflectivity')
t.set_y(1.1)
# second subplot
ax2 = fig.add_subplot(122)
ds_smooth_georef.DBZH_CORR.plot(x="x", y="y", ax=ax2, cmap="jet", vmin=0, vmax=40)
t = plt.title(r'Attenuation corrected reflecivity')
t.set_y(1.1)
Library Reference
Seealso
Get more information about the attenuation correction module in the library reference section.