[GRASS-dev] [GRASS GIS] #2545: i.atcorr RapidEye band1

GRASS GIS trac at osgeo.org
Sun May 7 11:14:41 PDT 2017

#2545: i.atcorr RapidEye band1
  Reporter:  chrisraa     |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  normal       |  Milestone:  7.2.2
 Component:  Imagery      |    Version:  svn-releasebranch72
Resolution:               |   Keywords:  i.atcorr
       CPU:  Unspecified  |   Platform:  MSWindows 7

Comment (by neteler):

 Replying to [comment:6 craab]:
 > I tested the adjustment and it works,

 I have backported it in r71053.

 > but it is not part of the solution either. However, I traced back the
 problem to the optical thickness value, which was to high:
 > ([https://www.rese-apps.com/pdf/atcor3_manual.pdf] , page 19)
 > "If the visibility is assumed too low (optical thickness too high) the
 path radiance becomes
 > high, and this may cause a physically unreasonable negative surface
 refectance. Therefore,
 > dark surfaces of low refectance, and correspondingly low radiance
 c0+c1DN, are especially
 > sensitive  in  this  respect."
 > I guess the ticket can be closed and I will try to put together a
 paragraph for the manual.

 Please consider to provide a manual text snippet, even here or as a patch
 to the HTML page.

Ticket URL: <https://trac.osgeo.org/grass/ticket/2545#comment:8>
GRASS GIS <https://grass.osgeo.org>

More information about the grass-dev mailing list