I think it's a 50km spacing grid over the ocean. There are multiple satellites, so they get multiple scans per day. Also, they might ingest the data into a mo

I think it's a 50km spacing grid over the ocean. There are multiple satellites, so they get multiple scans per day. Also, they might ingest the data into a model, and report the model outputs, so this could enhance temporal resolution. Another issue with in situ sensors is calibration and uniformity. Unless they were installed by a central authority, they are likely to all be different. This makes analysis harder.