Projection problem for UTM 28N

Optical Toolbox
#1

I have been processing data along the Senegal coast:

I have successfully processed Sentinel-1 data including projecting it using CRS 32628

However when I apply the same projection to Sentinel-2 data I get blank result and cannot visualise the data. If I use CRS 31028 I get what I would expect ie non-blank results beautifully illuminating the Senegalese coast.

Why does 31028 work for Sentinel-1 and Sentinel-2 and 32628 only work with Sentinel-1?

Any words of wisdom gratefully received - thanks

#2

Sentinel-2 data is already in UTM coordinates. Probably SNAP doesn’t like to reproject the data to the same CRS again.
Sentinel-1 is given in WGS84.

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