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NASA's Surface Water and Ocean Topography (SWOT) satellite provides per-feature summaries of lakes and rivers from Ka-band radar interferometry. This auxiliary product structures raw pixel data into georeferenced features, each with averaged attributes like water surface height, area, width, and slope. It is designed to enable consistent tracking of water bodies over time for hydrological analysis.
Data is distributed in NetCDF-4 format; users must be familiar with this standard and CF conventions. The listed future 'last updated' date should be verified.