[GRASS-dev] [GRASS-user] i.landsat.toar fails to convert DNs (bands 61 and 62) to temperature for Landsat 7 scene

Nikos Alexandris nik at nikosalexandris.net
Sat Nov 16 16:12:17 PST 2013


Dear Jorge,

I understand that your free time is very limited. Anyhow, just wanted to ping you about this.

Many thanks, Nikos


On Friday 15 of November 2013 18:37:38 Nikos Alexandris wrote:
> This seems to not work again :-(.  This time using the MTL file (for the
> corresponding scene): LE71260592002195SGS00_MTL.txt. No "MTLold" available
> in the downloaded scene.
> 
> Nikos
> 
> On Thursday 14 of February 2013 15:33:17 Nikos Alexandris wrote:
> > Nikos Alexandris wrote:
> > > While  i.landsat.toar  works just fine with all bands in converting DNs
> > > to
> > > Radiance/Reflectance (with some method=dos?), it seems, at least in once
> > > case (scene LE71840312002041SGS00), it fails to convert bands 61 and 62
> > > in
> > > temperature!
> > > 
> > > Same happens (as described below in both G64 and G70).
> > > Can anyone confirm or reject?
> > 
> > [deleted stuff]
> > 
> > Using the old metadata file (in this case:
> > LE71840312002041SGS00_MTLold.txt) works fine.
> > 
> > GRASS 6.4.3svn (wgs84_utm_z34_test):~ > r.info -r B.DOS1.ToCR.61
> > min=158.263805493393
> > max=338.623091571347
> > 
> > GRASS 6.4.3svn (wgs84_utm_z34_test):~ > r.info -r B.DOS1.ToCR.62
> > min=240.06999848884
> > max=322.080084447704
> > 
> > 
> > I guess it is a bug (something that got away in latest updates of
> > i.landsat.toar towards the newer metadata file).  Will try to check
> > further... not today though, deadlines approaching.
> > 
> > Best, Nikos
> > _______________________________________________
> > grass-user mailing list
> > grass-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/grass-user

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