I have opened the “cloud_in” band from a Sentinel 3 acquisition in Snap. Each pixel in the mask seems to be from a small set of integer values, leading me to believe that the mask needs to be decoded in order to extract quantitative information about the cloud probability for that pixel. However I have not been able to find a resource online that explains how to perform the decoding of the mask values.
Could someone point me toward a document explaining what the values of the cloud mask represent please?
Ultimately I would like to import or generate a cloud probability mask in python. So a document containing explicit instructions of transforming the “cloud_in” pixel value to the probability that a cloud is present at that pixel would be desirable.