Question about geometric relict in L2A converted images

[marpet]

@mcgregorian1

I differenced that image with the L2A file directly from Copernicus

For the official products a different DEM is used.

Replication of sen2cor correction to L1C data

Hello drozenrechels, unfortunately you will find on SciHub no homogenous time-series as you look for. The data you can download are processed with very different Sen2Cor-versions and especially in 2018 there had been major changes. You can find more details in [B. Pflug et.al.,“Next updates of atmospheric correction processor Sen2Cor”, Proc. SPIE 11533, Image and Signal Processing for Remote Sensing XXVI, 1153304 (20 September 2020); https://doi.org/10.1117/12.2574035]. If this is not sufficie…

This might be the reason why you see the difference.
The DEM used is Planet DEM. But it is not freely available.

But actually I don’t know why the different DEM could lead could lead to the strong horizontal edge.

P.S. Thanks for the good documentation of you case.