Minimize Atmospheric Correction
In essence, VGT atmospheric correction is the same as SYN atmospheric correction described in Computation of Aersol Parameters. The only difference is the auxiliary file used. The top-of-atmosphere reflectance has to be transformed into surface reflectance. This parameter is then included in the VGK product, defined as the input of the IPF processor dedicated to VGT-S processing. Computation of the NDVI parameter is also added.