Dear Vero, I could finally load the landsat 8 L1C data, is just two bands 4 and 5 for NDVI calculation, didn't created a mapset just used PERMANT, but my workflow is
Step 1 - DN>Radiance with *i.landsat.toar * Step* 2- Raniance> Surface_Reflectance with i.atcorr *using different methods DOS2 and DOS4 to compare *For step 1: to get radinace from DN* A) set working directory where the data is: cd "C:\Users\Gabriel\Documents\grassdata\LC08_L1TP_227083_20180315_20180320_01_T1" B) calculate Radiance for each band separately : i.landsat.toar -r input=LC08_L1TP_227083_20180315_20180320_01_T1_B4@PERMANENT output=LC08_L1TP_227083_20180315_20180320_01_T1_B4_toar metfile=C:\Users\Gabriel\Documents\grassdata\LC08_L1TP_227083_20180315_20180320_01_T1\LC08_L1TP_227083_20180315_20180320_01_T1_MTL.txt sensor=oli8 date=2018-03-15 sun_elevation=45.06637424 product_date=2018-03-20 however go the error was: [image: image.png] appears not to be reading the data from PERMANENT? Thanks a lot Gabriel
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