On Dec 15, 2017 3:54 PM, "Žofie Cimburová" <zoficimbur...@gmail.com> wrote: > > Dear all, > I am trying to use i.atcorr (GRASS 7.4) to apply atmospheric corrections for Sentinel 2 data. The documentation provides a great help, but there are two points I am not sure about - > > - I don't need the atmospheric correction to be applied to the whole scene, so I only imported a small clip of the scene to GRASS. What longitude and latitude shall I then specify in the 6S parameters?
I'd use the center coordinates of the clipped area. > Or is it necessary to apply the corrections to the entire scene? No since it is a pixel based algorithm. > - How can I estimate the value of visibility (aerosol model concentration)? There are AERONET data online somewhere which might be the best choice. Markus
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