Reprojection of OLCI to Sentinel-2 grid shifted by approx. 4 x 300m in X and Y

[marpet]

Maybe you are still using the tie-point based geo-coding. To get a more accurate geo-referencing you can switch to a pixel based geo-coding. But this will slow down the processing.

Best practice to convert and reproject Sentinel-3 radiances to reflectance

Maybe the problem is also that you use the tie-point based GeoCoding of OLCI. You can switch to pixel based GeoCoding. [image] This setting is also considered when using the command line.