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GeospatialFootprint + Timestamp -> GeometryAngles
Calculate precise solar and satellite viewing angles (azimuth and elevation) for each pixel using orbital ephemeris and acquisition timestamps.
Problem it solves
Atmospheric correction and reflectance standardization require exact solar and sensor geometries per pixel across the scene footprint.
Consumes
Emits
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.