Hi Michal,
I have been doing atmospheric correction on Aster-Images lately, what kind of imagery are you using?
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<div class="quote-author" style="font-weight: bold;">mike_woods wrote:</div>
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Welcome everybody.
I am a complete novice in GRASS and I'd be grateful, if one could take me
through the procedure of i.atcorr module. I have so far prepared text file
with parameters described in GRASS help resource, but I found some info that
I need some additional data (DEM and DN-radiance conversion?). </div>
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DN-radiance conversion is quite easy. You can do this with r.mapcalc. The conversion-formula can be looked up in the Handbook of the Satellite-Platform. But normally it is "(DN value - 1) * unit conversion coefficient".
Greetings
Stefan
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