Radiometric correction

[Pavak]

How can I do get surface reflectance from Landsat8?
Should I convert reflectance to radiance before doing ndvi?

[marpet]

A bit late but maybe still valuable for you.

Statistics in SNAP

Hi Lukáš, USGS stores DN in the GeoTiff files of Landsat 8. In the *_MTL.txt are conversion factors to radiances and reflectances stored. If you use the MTL.txt file to open the L8 data you will get the radiances. There is a property which lets you switch to reflectances. If not present, create a file 's3tbx.properties' in the folder [USER_HOME]/.snap/etc in this file 's3tbx.properties' add the entry s3tbx.landsat.readAs=reflectance If you open the GeoTiff files individually you will g…

No need to convert reflectances before doing the NDVI.