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NAMEi.aster.toar - Calculates Top of Atmosphere Radiance/Reflectance/Brightness Temperature from ASTER DN.KEYWORDSimagery, radiometric conversion, radiance, reflectance, brightness temperature, satellite, ASTERSYNOPSISi.aster.toari.aster.toar --help i.aster.toar [-rabcde] input=name[,name,...] dayofyear=float sun_elevation=float output=name [--overwrite] [--help] [--verbose] [--quiet] [--ui] Flags:
Parameters:
DESCRIPTIONi.aster.toar calculates the Top Of Atmosphere (TOA) reflectance for Terra-ASTER L1B in the visible, NIR and SWIR bands (9+1 bands) and brigthness temperature for the TIR bands (5 bands), all from L1B DN values. It is useful to apply after import of original ASTER imagery that is generally in standard DN values range.The order of input bands is
NOTESInternally, a gain code is defined to modify gains according to spectral bands following the GeoSystems GmbH ATCOR Ver. 2.0 Calibration Files. The function is defined in gain_aster.c file./*Gain Code*/ /*0 - High (Not Applicable for band 10-14: TIR)*/ /*1 - Normal*/ /*2 - Low 1(Not Applicable for band 10-14: TIR)*/ /*3 - Low 2(Not Applicable for Band 1-3N/B and 10-14)*/ SEE ALSOi.landsat.toar, r.in.asterASTER sensor data download: ASTER: Advanced Spaceborne Thermal Emission and Reflection Radiometer AUTHORYann Chemin, CSU, AustraliaSOURCE CODEAvailable at: i.aster.toar source code (history)Main index | Imagery index | Topics index | Keywords index | Graphical index | Full index © 2003-2021 GRASS Development Team, GRASS GIS 7.8.6 Reference Manual
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