[GRASS-dev] [GRASS GIS] #1687: i.atcorr return NULL values

[GRASS GIS]

#1687: i.atcorr return NULL values
---------------------+------------------------------------------------------
 Reporter:  curvelo  |       Owner:  grass-dev@…              
     Type:  defect   |      Status:  new                      
 Priority:  normal   |   Milestone:  6.4.3                    
Component:  Imagery  |     Version:  6.4.2                    
 Keywords:           |    Platform:  MSWindows Vista          
      Cpu:  x86-64   |  
---------------------+------------------------------------------------------

Comment(by gisix):

 Another update:

 The same data sets as described in my previous comment were used
 (Spearfish AOI, 2 L3A tiles, no blackfill).

 The three bands red,green,blue were all processed by the controll files
 applicable for RapidEye-red/green/blue (i.e. each band was processed three
 times times, once with the control file intended for it, and also with the
 to other control files).

 Results:

 Control File "Blue":
 13
 05 09 18.00 -103.79170986 44.53451932
 2
 1
 30
 -1.100
 -1000
 88

 Output: Reasonable results for red and green band, blue band produces
 stark black and white image.
 --------------------------------------
 Control File "Green":

 13
 05 09 18.00 -103.79170986 44.53451932
 2
 1
 30
 -1.100
 -1000
 89

 Result: All bands produce just NULL values.

 --------------------------------------
 Control File "Red":

 13
 05 09 18.00 -103.79170986 44.53451932
 2
 1
 30
 -1.100
 -1000
 90

 Result: All bands produce reasonable output.

 Conclusion: There is an issue how the "green control" file controls the
 processing.

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/1687#comment:3>
GRASS GIS <http://grass.osgeo.org>