Level 1C Sentinel 2a

Hi all,

I have been given some Level 1C Sentinel 2a data to work with. I have been asked to do any radiometric corrections i think would benefit the data however, my understanding is that level 1A data is where the radiometric corrections take place and not at 1C. Could anyone enlighten me please?

Hi Ashley,

I don’t want to give the game away :slight_smile: but you can improve (correct) L1C data from TOA (Top Of Atmosphere) to BOA (Bottom Of Atmosphere) by processing from L1C to L2A using Sen2Cor.



S2 MPC Operations Manager

Hi @Jan
I’m working on Sentinel-2 data for crop classification is there any need to correct level 1c product radiometrically and geometrically prior to classification ??


Hey @Jan does the data from L1C need to be in a particular format to be able to run the Sen2Cor script on it? I can get it in GeoTIFF only.

Many thanks,

Hello @Pompey21 Marko

Sen2Cor uses the L1C SAFE Format products only. These are freely available form various sources, including https://scihub.copernicus.eu/



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@Jan thanks! I got the data I needed, now I just need to convert it!