Hello everyone.
I have been trying to apply radiometric calibration on Sentinel-2 L1C images (bands 2,3,4 and 8), but every time after layerstacking I come across this error: "Calibration requires gain and offset for each band". I have even tried to apply calibration band by band, but still the same error. In addition, there are no offset values in the header file to modify the image manually.
I would appreciate if you could help me.
Enrico Giuseppe Cadau
Dear Nadjmeh Mahdianzadeh , Level-1C data are already calibrated by ESA before the distribution.
In order to get the reflectance values you need simply to do the following:
Reflectance [%] = DN / 10000 * 100
where 10000 is the fixed quantification value and DN the digital count of each pixel.
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