Yes. The raw telemetry comes from the Sentinel-2 constellation, which is open access
However, querying the raw hub is slow :( API hosts the same data but indexes it via the STAC standard.
You don't pay for data, you only pay for the compute to process the pixels.
OP here. One of the wildest things I found was a project in Sub-Saharan Africa claiming dense forestry that had a heat signature (NO2) matching a light industrial zone. If anyone is working with Sentinel-5P data, I'd love to compare notes on cloud-masking algorithms.
