I am wondering if anyone has used l2gen with Wang's NIR/SWIR switching method with OLCI data? I've tried:
'aer_swir_short = Oa20_radiance.nc',
'aer_swir_long = Oa21_radiance.nc',
'aer_wave_short = Oa16_radiance.nc',
'aer_wave_long = Oa17_radiance.nc'
But get an error saying "-E- clo_parseOption: Invalid integer value=Oa20_radiance.nc for option key=aer_swir_short". Should I be using other bands or actual integers?
aer_wave_short (int) (default=765) = shortest sensor wavelength for aerosol
aer_wave_long (int) (default=865) = longest sensor wavelength for aerosol
aer_swir_short (int) (default=-1) = shortest sensor wavelength for
aer_swir_long (int) (default=-1) = longest sensor wavelength for SWIR-based
Would this be correct? Do I need all four NIR/SWIR wavelengths for aer_corr=-9 or just two wavelengths?
aer_swir_long=1012 (realized it is not OLCI band 1020 after reading this post: https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?pid=26855;hl=msl12%20olci
940 is NOT a band you want to use in the atmospheric correction as it is heavily contaminated by atmospheric water vapor. The point of the SWIR bands in the aerosol selection is to avoid the problem of NIR water leaving reflectance in highly turbid waters where the assumption of a "black pixel" doesn't hold for the NIR bands (but may for SWIR due to the increased water absorption in that region of the spectrum). Technically speaking, OLCI doesn't have SWIR bands (700-1100nm is NIR), so probably not a path you want to explore. You can try, or perhaps you could just use
and stick with the standard aer_opt=-3