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: MT1_L2B-FLUX-SCASL1A2-1.06_2015-01-01T12-42-24_V2-00.nc

Geotype dataset attributes

Dataset attribute	DataType	Dimensions	Value
_FillValue	int8	1	127
long_name	string	1	Geotype
Calibration_Equation	string	1	SDS_count = scale_factor*(physical_value - add_offset)
Total_Values	int32	1	129600
Comments	string	1	Each ScaRaB pixels (in their specific geometry) have geotype data. These data, derived from the IGBP, have been projected in the Level 2 processing. In this level-2B, they have been again reprojected on a 1 deg per 1 deg grid. Here all the information has been kept (i.e. not averaged). This parameter shows the 6 most represented geotype number found in each 1°per 1°pixel. IGBP Land Cover Legend:1=Evergreen Needleleaf Forest ; 2=Evergreen Broadleaf Forest ; 3=Deciduous Needleleaf Forest ; 4=Deciduous Broadleaf Forest ; 5=Mixed Forest ; 6=Closed Shrublands ; 7=Open Shrublands ; 8=Woody Savannas ; 9=Savannas ; 10=Grasslands ; 11=Permanent Wetlands ; 12=Croplands ; 13=Urban and Built-Up ; 14=Cropland/Natural Vegetation Mosaic ; 15=Snow and Ice ; 16=Barren or Sparsely Vegetated ; 17=Water Bodies ; 18=Tundra ; 19=Fresh Snow ; 20= Sea Ice.
scale_factor	float64	1	1.0
scale_factor_err	float64	1	0.0
add_offset	float64	1	0.0
add_offset_err	float64	1	0.0
Missing_Value	int8	1	-128
units	string	1	N/A
valid_range	int32	2	[1, 20]