[GRASS-user] question on Landsat 8 radiometric and atmospheric corr.

[Gabriel Cotlier]

Dear grass users,

My question is regrading the preprocessing of Landsat 8 data.
I have LC08_L1TP, level 1 Landsat 8 data product loaded in grass project
and want to perform the preprocessing of these data sets.
The procedure of turning DN to Radiance (radiometric calibration) by means
of *i.landsat.toar *grass function, and thereafter turning obtained
Radiance to Land Surface Reflectance (Atmospheric correction) by means of
grass function *i.atcorr* to get final reflectance results by means
different DOS methods to be further compared.

I enter the data band
[image: image.png]
I entered the metadata

[image: image.png]

  I left these two following tabs as default settings
[image: image.png]

[image: image.png]

and got this error:

i.landsat.toar input=B4 at PERMANENT output=B4_radiance
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
WARNING: ESUN evaluated from REFLECTANCE_MAXIMUM_BAND
WARNING: Overwriting solar elevation of metadata file
Calculating...
ERROR: Unable to open header file for raster map <B4 at PERMANENT1@>
(Fri Jun 14 10:52:44 2019) Command finished (0 sec)

I would like to load and run this process for many bands at once but the
GUI for this functions do not permit to input more than one band at once.
Could be this done more efficiently by command line? Any suggestion for
this preprocessing by command line or either by python scrip ?

Thanks a lot.
Gabriel
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