Dear Grass users, i am running i.atcorr on a worldview2 band (red band) and the resulting map is empty, values are only NaN.
the input image is in reflectance, the values are integer between 0-255 i have set the g.region with the input image the parameters are 16 # indicates that it is worldview2 image 12 11 15.750 -47.115 -22.822 # image taken on the 11th of December at 15:45 GMT in decimals; the center of the image lies at 47.115 °W and -22.822°S 1 # the tropical atmospheric model 1 # the continental aerosol model 0 # I have an estimate of aerosol optical depth so 0 0.100 # aerosol optical depth at 550nm -.6121813 # the terrain lies 612 meters above sea level [km] * -1 -770 # image taken of a satellite sensor at 770 km 106 # 106 : red band of the worldview2 sensor I see that the first part is ok, the algorithm compute the estimated visibility (63.66 km) , but then the atmospheric correction did not run and produce and empty raster. the test with an elevation raster didn't change nothing. i have try to set by hand the wl inf and sup in the parameter file (wl inf= 0.350 mic wl sup= 1.100 mic, for the red band ), here the return by verbose is slighty different, but again i have an empty raster does anyone have an idea of what i am missing ? Cheers, Fabien
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