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GEUS-SICE / SICE-EDC

Euro Data Cube Version of SICE Pipeline
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Is the Sentinel-3 OLCI L1B Sentinel Hub data collection returning a radiance or a reflectance? #6

Open AdrienWehrle opened 2 months ago

AdrienWehrle commented 2 months ago

At the moment in this SICE pipeline using sentinelhub-py, it's assumed the Sentinel-3 OLCI L1B product returned by Sentinel Hub is a reflectance and not a radiance, hence no radiance-to-reflectance algorithm is being applied. Yet recently, browsing through the description of the Sentinel Hub data collection associated with Sentinel-3 OLCI L1B, I got confused.

I either interpret the doc as Sentinel Hub takes L1B radiances, converts them to reflectances and return those reflectances in the L1B product, or as Sentinel Hub directly returning L1B radiances but naming them reflectances.

I'm giving more details here.

Maybe @maximlamare or @Kampen1988 can help here? :)

AdrienWehrle commented 2 months ago

tagging @RasmusBahbah @jasonebox @BaptisteVandecrux

AdrienWehrle commented 1 month ago

Following a discussion with Maxim Lamare here, it appears the sentinelhub-py OLCI data collection is a reflectance with no correction applied.

It should hence be similar to the reflectance we used to get from passing the OLCI L1 EFR into the SNAP Rad2Refl processor that we would then send to sice-py (in this version of SICE), hence I think there's no modification needed in this SICE-EDC!