Thank you for your answer Nikos, may it possible to enter manually the " Red of wv2_spectral_response_for_i.atcorr " in the list of parameters ? For example in the parameter files, as specified in the manual, set the Sensor band to 1 and Enter wlinf, wlsup and user's filter function s(lambda) by step of 0.0025 micrometer. what do you think ? i will try today and see if it works cheers, Fabien
2017-04-12 7:58 GMT-03:00 Nikos Alexandris <[email protected]>: > * Fabien Wagner <[email protected]> [2017-04-11 15:21:41 -0300]: > > > 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 ? >> > > Dear Fabien, > > this https://trac.osgeo.org/grass/ticket/2059 is still standing, as far > as I can tell. > > Nikos >
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