[GRASS-user] i.atcorr with Landsat 8

[Nikos Alexandris]

* Nikos Alexandris <nik at nikosalexandris.net> [2015-05-23 11:04:19 +0300]:

> * Micha Silver <micha at arava.co.il> [2015-05-23 10:05:14 +0300]:
> 
> >    When doing atmospheric correction with i.atcorr on LandSat 8 images (after
> >    i.landsat.toar), is it correct to set range="0,65535"?
> 
> Hi Micha.
> 
> After i.landsat.toar you will have either Radiance or Reflectance. For
> both the 11-bit range suggested above is not valid I think.

16-bit that was meant to be!

> In the metadata file the minimum and maximum values for spectral radiance are
> reported (watts / m^2 * ster * microns). As for the reflectance, it is
> unitless and should, in theory, range in [0, 1.0]. Though, outliers are
> sometimes expected.

See also:
<http://landsathandbook.gsfc.nasa.gov/data_prod/prog_sect11_3.html#top>.

Nikos