Product Documentation

Product definition document:

PDD_SCA_L2-FLUX_V1_R2.pdf (updated in March 2019)

Version history:

Version 1.00: Released October 2013. Original version
Version 2.00: Released January 2015. Added an extra time dimension in the netcdf file and a new variable (Viewing zenith angle at the pixel center (VZA)). Minor format corrections.
Version 2.01: Released March 2019. 1. Relative Azimuth angle: The β angle, the angle between the direction of the Sun and the orbit plane varies from -45° to 45° for Megha-Tropiques platform. It is necessary to turn the satellite round (flip maneuver) so that the solar panels are more illuminated (see Handbook of Satellite orbits from Michel Capderou).
This flip maneuver is made when the sign of β changes , and the referential for calculating the azimuth angle too. We calculate the new relative azimuth angle to have the same convention of azimuth calculation: the Sun always have a relative azimuth angle of 180°.
2. Auxiliary Channels: The two auxiliary channels radiances (Infrared and visible) are added in the L2B files ( TOA_IR_Rad and TOA_VIS_Rad)

File description: SCARAB-L2B-FLUX


Product file format: NetCDF3

Product datasets

Dataset DataType Dimensions units valid_range scale_factor add_offset _FillValue Missing_Output long_name
time float64 [time*] seconds since 2011-10-12 00:00:00.000 NONE 1.0 0.0 99999.0 NONE time
layer int32 [layer] NONE NONE 1.0 0.0 2147483647 NONE layer
latitude float32 [latitude] Degrees_north [-29.5, 29.5] 1.0 0.0 99999.0 NONE latitude
longitude float32 [longitude] Degrees_east [0.5, 359.5] 1.0 0.0 99999.0 NONE longitude
Pixel_time float64 [time*,
latitude,
longitude]		 seconds since 2011-10-12 00:00:00.000 TBD 1.0 0.0 99999.0 NONE Pixel_time
Albedo float32 [time*,
latitude,
longitude]		 N/A [0.0, 1.0] 1.0 0.0 99999.0 NONE Albedo
TOA_SW_Flux float32 [time*,
latitude,
longitude]		 W m-2 [0.0, 1400.0] 1.0 0.0 99999.0 NONE TOA_SW_Flux
TOA_LW_Flux float32 [time*,
latitude,
longitude]		 W m-2 [0.0, 500.0] 1.0 0.0 99999.0 NONE TOA_LW_Flux
Quality_Index int32 [time*,
latitude,
longitude]		 TBD TBD 1.0 0.0 2147483647 NONE Quality_Index
Box_percent_coverage float32 [time*,
latitude,
longitude]		 % TBD 1.0 0.0 99999.0 NONE Box_percent_coverage
Solar_Zenith_Angle float32 [time*,
latitude,
longitude]		 Degrees [0.0, 180.0] 1.0 0.0 99999.0 NONE Solar_Zenith_Angle
Viewing_Zenith_Angle float32 [time*,
latitude,
longitude]		 Degrees [0.0, 70.0] 1.0 0.0 99999.0 NONE Viewing_Zenith_Angle
Geotype int8 [time*,
layer,
latitude,
longitude]		 N/A [1, 20] 1.0 0.0 127 NONE Geotype
Geotype_percent_coverage float32 [time*,
layer,
latitude,
longitude]		 N/A [0.0, 100.0] 1.0 0.0 99999.0 NONE Geotype_percent_coverage
SW_Scene_Identification int8 [time*,
layer,
latitude,
longitude]		 N/A [0, 5] 1.0 0.0 127 NONE SW_Scene_Identification
SW_Scene_Identification_percent_coverage float32 [time*,
layer,
latitude,
longitude]		 % [0.0, 100.0] 1.0 0.0 99999.0 NONE SW_Scene_Identification_percent_coverage
LW_Scene_Identification int8 [time*,
layer,
latitude,
longitude]		 N/A [0, 4] 1.0 0.0 127 NONE LW_Scene_Identification
LW_Scene_Identification_percent_coverage float32 [time*,
layer,
latitude,
longitude]		 % [0.0, 100.0] 1.0 0.0 99999.0 NONE LW_Scene_Identification_percent_coverage

* : unlimited dimension



Product global attributes

Global attribute DataType Dimensions Value
File_Name string 1 MT1_L2B-FLUX-SCASL1A2-1.06_2015-01-01T12-42-24_V2-00.nc
Product_Description string 1 Level-2B 1deg grid-wise: The product contains one orbit of estimated top of the atmosphere (TOA) SW and LW fluxes as well as scene identifications and some input data (radiances, angles...).
North_Bounding_Latitude float64 1 30.0
South_Bounding_Latitude float64 1 -30.0
West_Bounding_Longitude float64 1 0.0
East_Bounding_Longitude float64 1 360.0
Nadir_Pixel_Size string 1 1.0 deg
Software_Version string 1 1.0.0
Product_Version string 1 V2-00
Production_Center string 1 ICARE
Production_Date string 1 2015/03/24 11:56:47
Sensors string 1 MT/SCARAB
Mission string 1 Megha-Tropiques
Input_Files string 1 MT1_L2-FLUX-SCASL1A2-1.06_2015-01-01T12-42-24_V2-00.hdf
Level1_File string 1 MT1SCASL1A2_1.06_000_9_16_I_2015_01_01_12_41_24_2015_01_01_13_57_06_16633_16634_172_47_48_KRU_00.h5
Ancillary_Files string 1 ALBE8501; FLUE8501; msw_txt; geoe8501; mwinter_txt
list_of_ECMWF_file string 1 ECMWF_201501020000_v1.3.0_1deg_AN.grb; ECMWF_201501011800_v1.3.0_1deg_AN.grb; ECMWF_201501011200_v1.3.0_1deg_AN.grb; ECMWF_201501010900_v1.3.0_1deg_FC_201412311200.grb; ECMWF_201501011500_v1.3.0_1deg_FC_201501010000.grb; ECMWF_201501012100_v1.3.0_1deg_FC_201501010000.grb
NETCDF_Version string 1 3
Orbit_Start_Number string 1 16633
Orbit_End_Number string 1 16634
Orbit_Revolution_Number string 1 47
Nskip string 1 NONE
Skip_Start_Scan_Number string 1 NONE
Skip_End_Scan_Number string 1 NONE
SLConf string 1 110010
Flip_Start_Scan_Number string 1 NONE
Flip_End_Scan_Number string 1 NONE
Man_Start_Scan_Number string 1 NONE
Man_End_Scan_Number string 1 NONE
Rad_Cal_File_Version string 1 9_16
Geom_Cal_File_Version string 1 9_16
QF_Product string 1 100.00
Proc_Param_File_Version string 1 ISRO_SAC_DP-MT1-SCAL1A2SW-VER-1.06F000(ISRO_SAC_DP-MT1-SW_PROD_ID-100_01_L1A2_011_01_L1A3-0007000)
A_coefficient string 1 0.9160
Level1_Version string 1 ISRO_SAC_DP-MT1-SCAL1A2SW-VER-1.06F000(ISRO_SAC_DP-MT1-SW_PROD_ID-100_01_L1A2_011_01_L1A3-0007000)
Beginning_Acquisition_Date string 1 2015-01-01T12:42:24
End_Acquisition_Date string 1 2015-01-01T13:57:06
Product_Name string 1 MT1_L2B-FLUX-SCASL1A2-1.06
Icare_ID string 1 20150101124230

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