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

[Gabriel Cotlier]

Hello,

I tried it to get radiance from command line too but had an error as well
with metadata recognition:


[image: image.png]
Thanks a lot


On Sun, Jun 16, 2019 at 5:19 PM Gabriel Cotlier <gabiklm01 at gmail.com> wrote:

> 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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