Atmospheric corrections applied to Sentinel L2A Products

s2tbx
#1

I was trying to implement this paper on detecting methane plumes using Sentinel 2. The paper uses L1C product.

I wanted to eliminate the effects of water vapor, so I tried to identify the plumes using Sentinel 2 L2A product. The results I got were quite different from what I was expecting.

I wanted to understand what all corrections get applied as a part of L1C to L2A conversion? Are these corrections applied to just to eliminate / reduce effects of water vapor or for other trace gases like Methane and CO2 as well?

I even had a look at sen2cor, and wanted to understand if only selected corrections can be applied to L1C product to convert it to L2A?

Thanks in advance.

#2

There are several technical documents that you have to read before processing the data:
https://sentinels.copernicus.eu/web/sentinel/technical-guides/sentinel-2-msi/msi-instrument
All products derived and delivered by ESA/EUMETSAT or others have an algorithm theoretical basis document (ATBD) that is convenient to review.

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