Hi Nikos, generally zenith angle = 90 - SUN_ELEVATION ANGLE indeed.
Cheers, Yann On 8 January 2013 21:08, Nikos Alexandris <n...@nikosalexandris.net> wrote: > Sorry for cross-posting. > > I would like a confirmation for the following, regarding i.topo.corr: > > Is SUN_ELEVATION the requested zenith parameter (by i.topo.corr)? > > So, given the entry "SUN_ELEVATION = 45.38304417" in the the metadata file > "LT51840322011266MOR00_MTL.txt", then, the production of an illumination model > requires "zenith=45.38304417". > > Or is it "zenith = 90 - SUN_ELEVATION", thus it becomes > zenith = 90 - 45.38304417 = 44.616956 > > ? > > Thank you, Nikos > _______________________________________________ > grass-dev mailing list > grass-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-dev -- Yann Chemin Researcher@IWMI Skype/FB: yann.chemin _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev