Bands and Tie Grids are not aligned

If I display a S3 OLCI Band, and a Tie Point Grid, the two do not fully align. Does anyone know why this is? Is it a feature (or bug?) of the spacecraft? SNAP processing?



The radiance bands have no-data stripes on the left and right side. You can see them when enabling the no-data overlay .

By the way, you should enable the pixel geo-coding for accurate geo-location, if not already done.

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Your first image isn’t showing up.
Do the preferences also work with GPT? Or is there some other way to do this with GPT?

Also thanks for the no-data hint. I’ll now try to find an operator to clip the SZA to the radiance bands based on the valid data.

I think you can set the valid pixel expression of SZA to quality_flags.invalid or Oa01_radiance.raw==65535

The geo-coding property is also used by gpt.

Yes geo-coding clearly used by gpt. The graph is running ~30x slower now ! :(. But it is OK, I guess the data is better. :slight_smile:

Yes, it’s much slower. But with tie-points you can be up to 6-8 pixels off. So it’s really worth it

Related topic: Per-pixel geocoding drops large portions of scenes