[GRASS-user] Re: i.atcorr returns all NULL values

zackparisa zacharyparisa at gmail.com
Fri Aug 13 23:19:14 EDT 2010


I am getting the same error when working with AVNIR data. Bands 1 and 4 go
through great--however when the sensor condition codes are used for bands 2
and 3 (82 and 83 respectively) the outuput is full of NULL values. 
I ran a similar test as Brian-- used the sensor condition codes from bands 1
and 4, and the output in those cases were fine.

I'm using Grass 6.5 on Ubuntu 10.4 64bit 

Example code: 
##THIS WORKS##
i.atcorr -o iimg=ALAV2A068212970-O1B2G_U_04rectified at PERMANENT iscl=0,255
ialt=dem_patch at PERMANENT
icnd=/home/hannibal/Projects/LandM/spring_iatcor_4.txt
oimg=ALAV2A068212970-O1B2G_U_04rectified_at oscl=0,255 --overwrite

WHERE the icnd file =
11                            
05 06 16.900 -89.967 31.318    
2                            
1                            
9.65                      
-0.100                       
-1000                       
84

FROM r.info on result:  Range of data:    min = 0  max = 255

##THIS DOESN'T WORK##
i.atcorr -o iimg=ALAV2A068212970-O1B2G_U_02rectified at PERMANENT iscl=0,255
ialt=dem_patch at PERMANENT
icnd=/home/hannibal/Projects/LandM/spring_iatcor_2.txt
oimg=ALAV2A068212970-O1B2G_U_02rectified_at oscl=0,255 --overwrite --verbose

WHERE the icnd file =
11                            
05 06 16.900 -89.967 31.318    
2                            
1                            
9.65                      
-0.100                       
-1000                       
82

FROM r.info on result: Range of data:    min = NULL  max = NULL  


Any ideas on this would be very much appreciated...I just can't figure out
where the issue is.

Thanks,

Zack


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