CALIPSO/CLOUDSAT Vertical Cloud Mask Categorization

Version history:

Version 2-23: algorithm version 2.0.8, CLOUDSAT Level 1 and 2 R05, CALIOP Level 1 versions 4.1x and level 2 versions 4.2x, IIR L1 versions 2-00 and V2-01, Released June 2021

File description: DARDAR-MASK


Product file format: NetCDF4

Product datasets

Dataset DataType Dimensions units valid_range scale_factor add_offset _FillValue Missing_Output long_name
MODIS_Sensor_azimuth int16 [?] degrees [-18000 18000] [ 100.] [ 0.] [-32767] NONE Sensor azimuth angle for MODIS pixel
CALIOP_Attenuated_Backscatter_1064_Random_Error float32 [?,
?]		 m-1.sr-1 NONE NONE NONE [-9999.] NONE Random measurement error in Total Attenuated backscatter at 1064nm
CALIOP_Land_Water_Mask int8 [?] 1 [0 7] NONE NONE [-9] NONE Land Water Mask from Calipso files
CLOUDSAT_Target_Radar_Mask int8 [?,
?]		 1 [-2 4] NONE NONE [-1] NONE RADAR instrument flags
CALIOP_Attenuated_Backscatter_1064 float32 [?,
?]		 km-1.sr-1 NONE NONE NONE [-9999.] NONE CALIOP Attenuated backscatter at 1064nm
CLOUDSAT_Spacecraft_Altitude float32 [?] km [ 700. 740.] NONE NONE [-9999.] NONE Altitude of the CLOUDSAT satellite above reference surface (~ mean sea level)
MODIS_Wavelength float32 [?] microns NONE NONE NONE NONE NONE MODIS Radiances Channel wavelength
CLOUDSAT_2B_GEOPROF_Radar_Reflectivity int16 [?,
?]		 dBZ [-180 180] [ 100.] [ 0.] [-8888] NONE Radar Reflectivity at 94GHz
CLOUDSAT_2B_GEOPROF_CPR_Gaseous_Attenuation int16 [?,
?]		 dBZ [ 0 1000] [ 100.] [ 0.] [-9999] NONE Gaseous Attenuation
CLOUDSAT_Target_Lidar_Mask int8 [?,
?]		 1 [-3 2] NONE NONE [-4] NONE LIDAR instrument flags
Specific_humidity float32 [?,
?]		 kg.kg**-1 NONE NONE NONE [-999.] NONE Specific humidity from ECMWF model, interpolated on DARDAR heights
V_velocity float32 [?,
?]		 m.s-1 NONE NONE NONE [-999.] NONE V component of wind from ECMWF model, interpolated on DARDAR heights
CALIOP_Lidar_Beam_Divergence float32 [?] microrad NONE NONE NONE [-9999.] NONE CALIPSO Lidar beam divergence
CALIOP_IGBP_Surface_Type int8 [?] 1 [ 0 50] NONE NONE [-9] NONE IGBP Surface Type from Calipso files
MODIS_Radiance float32 [?,
?]		 W.m-2.um-1.sr-1 NONE NONE NONE [-999.] NONE Radiances at the top of the Atmosphere from Modis
DARMASK_Ice_Rain int8 [?,
?]		 1 [0 4] NONE NONE [-1] NONE Instrument flags for ice and rain detection
Ozone float32 [?,
?]		 kg.kg**-1 NONE NONE NONE [-999.] NONE Ozone mixing ratio from ECMWF model, interpolated on DARDAR heights
CLOUDSAT_Random_Measurement_Error float32 [?,
?]		 dBZ NONE NONE NONE [-9999.] NONE Random Measurement Error in Radar Reflectivity at 94GHz
CS_TRACK_Height float32 [?] km NONE NONE NONE NONE NONE Height of range bin
Temperature_2m float32 [?] K NONE NONE NONE [-999.] NONE Two-meter temperature from ECMWF model
IIR_Channel_Wavelength float32 [?] um NONE NONE NONE NONE NONE CALIPSO IIR Channels Wavelength
CALIOP_Calibration_Constant_Uncertainty_1064 float32 [?] km3.sr [ 5.00000000e+07 4.00000000e+09] NONE NONE [-9999.] NONE Calibration constant uncertainty at 1064nm
Skin_temperature float32 [?] K NONE NONE NONE [-999.] NONE Skin Temperature from ECMWF model
CLOUDSAT_TAI_Time float64 [?] s NONE NONE NONE [-9999.] NONE Time of the CLOUDSAT footprint in the TAI93 convention
CLOUDSAT_Latitude float32 [?] degrees_north [-90. 90.] NONE NONE [-9999.] NONE Latitude of the CLOUDSAT footprint
CLOUDSAT_UTC_Time float64 [?] seconds since 20190101 NONE NONE NONE NONE NONE Radar Footprint UTC time
CALIOP_Perpendicular_Attenuated_Backscatter_532 float32 [?,
?]		 km-1.sr-1 NONE NONE NONE [-9999.] NONE CALIOP Perpendicular Attenuated backscatter at 532nm
CLOUDSAT_Longitude float32 [?] degrees_east [-180. 180.] NONE NONE [-9999.] NONE Longitude of the CLOUDSAT footprint
V10_velocity float32 [?] m.s-1 NONE NONE NONE [-999.] NONE Ten-meter V component of wind from ECMWF model
Temperature float32 [?,
?]		 K NONE NONE NONE [-999.] NONE Temperature from ECMWF model, interpolated on DARDAR heights
MODIS_Solar_zenith int16 [?] degrees [ 0 18000] [ 100.] [ 0.] [-32767] NONE Solar zenith angle for MODIS pixel
CLOUDSAT_1B_CPR_Sigma_Zero int16 [?] dB [-1000 4000] [ 100.] [ 0.] [-9999] NONE Normalized surface cross section (not corrected for attenuation) from CloudSat
CALIOP_Total_Attenuated_Backscatter_532 float32 [?,
?]		 km-1.sr-1 NONE NONE NONE [-9999.] NONE CALIOP Total Attenuated backscatter at 532nm
DARMASK_Aerosol_liquid int8 [?,
?]		 1 [0 3] NONE NONE [-1] NONE Instrument flags for aerosol and liquid clouds detection
CLOUDSAT_Radar_Frequency float32 [?] GHz NONE NONE NONE NONE NONE Radar Frequency
CALIOP_Lidar_Telescope_Field_Of_View float32 [?] microrad NONE NONE NONE NONE NONE CALIPSO Lidar telescope field of view
MODIS_Sensor_zenith int16 [?] degrees [ 0 18000] [ 100.] [ 0.] [-32767] NONE Sensor zenith angle for MODIS pixel
Surface_pressure float32 [?] Pa NONE NONE NONE [-999.] NONE Surface Pressure from ECMWF model
IIR_Viewing_Azimuth_Angle int16 [?,
?]		 degrees [-180 180] [ 100.] [ 0.] [-9999] NONE IIR viewing azimuth angle for each channel
DARMASK_Simplified_Categorization int8 [?,
?]		 1 [-2 15] NONE NONE [-99] NONE DARMASK Categorization Flags
CALIOP_Lidar_Wavelength float32 [?] nm NONE NONE NONE NONE NONE CALIPSO Lidar wavelength
MODIS_Radiance_Uncert float32 [?,
?]		 % NONE NONE NONE [-999.] NONE Uncertainties Indexes from Modis
MODIS_Solar_azimuth int16 [?] degrees [-18000 18000] [ 100.] [ 0.] [-32767] NONE Solar zenith angle for MODIS pixel
Sea_surface_temperature float32 [?] K NONE NONE NONE [-999.] NONE Sea surface temperature from ECMWF model
CLOUDSAT_CALIOP_Time_Difference float32 [?] seconds [ 0. 1.] NONE NONE [-9999.] NONE Time difference between the CLOUDSAT footprint and the central CALIOP LIDAR shot
CALIOP_Profile_Time float64 [?,
?]		 seconds NONE NONE NONE [-Inf] NONE Profile time of the first and the last LIDAR shot averaged in the RADAR footprint (TAI93 convention)
CLOUDSAT_2B_GEOPROF_CPR_Cloud_Mask int8 [?,
?]		 1 [ 0 40] NONE NONE [-9] NONE CloudSat cloud mask
CLOUDSAT_CALIOP_Colocation_Distance float32 [?] km [ 0. 1.] NONE NONE [-9999.] NONE Distance between radar and lidar footprints
CALIOP_Profile_Time_Range float32 [?] NONE NONE NONE NONE NONE NONE NONE
Tropopause_Height float32 [?] km [ 4. 22.] NONE NONE [-Inf] NONE Tropopause Height from CALIOP L1, averaged in the RADAR footprint
U_velocity float32 [?,
?]		 m.s-1 NONE NONE NONE [-999.] NONE U component of wind from ECMWF model, interpolated on DARDAR heights
U10_velocity float32 [?] m.s-1 NONE NONE NONE [-999.] NONE Ten-meter U component of wind from ECMWF model
IIR_Viewing_Zenith_Angle int16 [?,
?]		 degrees [ 0 180] [ 100.] [ 0.] [-9999] NONE IIR viewing zenith angle for each channel
CALIOP_Day_Night_Flag int8 [?] 1 [0 1] NONE NONE [-1] NONE LIDAR Day Night Flag : Night (1) Day (0)
Pressure float32 [?,
?]		 Pa NONE NONE NONE [-999.] NONE Pressure from ECMWF model, interpolated on DARDAR heights
IIR_Radiance int16 [?,
?]		 W.m-2.sr-1.um-1 [ 0 32] [ 1000.] [ 0.] [-9999] NONE IIR calibrated radiances for each channel
CALIOP_Total_Backscatter_532_Random_Error float32 [?,
?]		 m-1.sr-1 NONE NONE NONE [-9999.] NONE Random measurement error in Total Attenuated backscatter at 532nm



Product global attributes

Global attribute DataType Dimensions Value
end_acquisition_date string 1 2019-01-01T02:34:11Z
software_version string 1 2.0.8
beginning_acquisition_date string 1 2019-01-01T00:55:40Z
nadir_pixel_size float64 2 [ 1. 1.]
input_files string 1 *** CSTRACK_CAL-IIR-L1 ***
0 : CSTRACK_CAL-IIR-L1_2019001005530_67526_V2-20.hdf

*** CSTRACK_CAL-LID-L1 ***
0 : CSTRACK_CAL-LID-L1_2019001005530_67526_V2-20.hdf

*** CSTRACK_CAL-LID-L2-VFM ***
0 : CSTRACK_CAL-LID-L2-VFM_2019001005530_67526_V2-20.hdf

*** CSTRACK_CS-1B-CPR ***
0 : CSTRACK_CS-1B-CPR_2019001005530_67526_V2-21.hdf

*** CSTRACK_CS-2B-GEOPROF ***
0 : CSTRACK_CS-2B-GEOPROF_2019001005530_67526_V2-20.hdf

*** CSTRACK_CS-ECMWF-AUX ***
0 : CSTRACK_CS-ECMWF-AUX_2019001005530_67526_V2-21.hdf

*** CSTRACK_CS-MODIS-AUX ***
0 : CSTRACK_CS-MODIS-AUX_2019001005530_67526_V2-20.hdf
attributes_info string 1 Nadir_Pixel_Size :\n[Along-track Resolution, Cross-track Resolution]
production_center string 1 AERIS/ICARE Data and Services Center
mission string 1 CLOUDSAT/CALIPSO
icare_ID string 1 N/A
geographic_projection string 1 CLOUDSAT Track
production_date string 1 2021-06-15T18:48:42Z
product_version string 1 V2-23
institution string 1 AERIS/ICARE Data and Services Center
NetCDF_version string 1 4.3.3.1
product_description string 1 Radar/Lidar Categorization Mask
source string 1 satellite observation
title string 1 DARDAR-MASK product
product_name string 1 DARDAR-MASK
comment string 1 à
Conventions string 1 CF-1.7
file_name string 1 DARDAR-MASK_2019001005530_67526_V2-23.nc
history string 1 darmask_builder 2.0.8
references string 1 https://www.icare.univ-lille.fr/dardar
Contact string 1 icare-contact@univ-lille.fr
orbit_id string 1 2019001005530_67526

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