[GRASS-user] question on i.landsat.toa function

[Gabriel Cotlier]

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 at 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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