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Element84 / earth-search

Earth Search information and issue tracking
https://earth-search.aws.element84.com/v1
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Sentinel-2 "eo:cloud_cover" doesn't match between v0 and v1 #5

Open waltersdan opened 1 year ago

waltersdan commented 1 year ago

When querying Sentinel-2 l2a imagery from these two collections: https://earth-search.aws.element84.com/v0/collections/sentinel-s2-l2a-cogs https://earth-search.aws.element84.com/v1/collections/sentinel-2-l2a I can get the exact same images, except the property "eo:cloud_cover" is different for matching images.

For example, these are the eo:cloud_cover values for a set of images from v0: 56.36
87.25

  1. 97.13 And the same images from v1: 78.148019 92.783248 99.999213 86.64819 I have verified they are the exact same images and have the exact same pixel values for several bands including SCL. The only difference seems to be the metadata

tnigon commented 1 year ago

I've noticed this as well. Although I do not know for sure, I'm presuming it has to do with Earthsearch V1 using the most recent version of Sen2Cor, which was released on December 6, 2022.

I'd be interested in confirmation of this, as well as any other nuances on the topic.

matthewhanson commented 1 year ago

Yes, this may be an issue with the fact that the processing baseline between the L2 scene in Earth Search and the linked to L1 scene may have different processing baselines. With the new reprocessing happening by ESA we hopefully can get this fixed. Stay tuned to an update on the mailing list (and will post an issue in this repo).