My question is what should be the input image in
i.atcorr for grass 6.4.4 version?
I tried giving both reflectance (DN) and radiance as input but values are coming properly. I read some where, it internally converts to radiance and uses. Is it like that? If I give radiance as input, the values are not coming properly in shadow region effect is more. So I used
i.landsat.toar and given as input to
i.atcorr without marking the flag input converted to reflectance(default is radiance). But the output values are not correct for flat terrain and hilly terrain (both tested)
Also one more I need to know is if I would compare the output of
i.atcorr with surface reflectance product (from landsat website) will it be proper or not? I have used srtm dem and atmospheric parameters from modis website. So all the parameters are given, but is it correct way to verify our final output or any other way is there? I will be highly thankful to you if any solution is provided.