[GRASS-user] i.atcorr empty raster

[Xavier de Lamo]

Dear all,



I am recent GRASS GIS user who is trying to run the *i.atcorr* module to
atmospherically correct a Landsat ETM+ image in GRASS 7 (on MacBook Pro,
Mavericks OSX). This image has been already converted to reflectance
with *i.landsat.
toar*. I also use a DEM file obtained from ASTER GDEM. All these files are
projected to UTM zone 36 S.



I have followed the steps described in the manual and everything seems to
be fine except that the process returns an empty raster (all raster values
equal to NoData).



 This is the command:



i.atcorr –r –a input=
LakeChirwaN-REFL1 at Malawiparameters=/Users/Xavi/Desktop/LCDM.txt
output=LakeChirwaN_REFL1_ATCORR



And the LCDM file looks like this:



8                                               -- Landsat ETM+

5 26 7.487 35.753 -14.414  -- month day hh.ddd longitude latitude

1                                               -- Atmospheric model:
tropical

0                                               -- Visibility

-0.009                                      -- Aerosol Optical Depth 550 nm

-0.650                                      -- Mean target elevation (in
Km) *-1

-1000                                       -- Sensor height (on board a
satellite)

61                                            -- Sensor band (ETM+ band 1)




Could someone give help me on this please?



Thanks in advance!!
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