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NASA's Crustal Dynamics Data Information System archives daily broadcast ephemeris files from a global network of ground receivers tracking multiple satellite constellations. Since 2011, the archive has expanded beyond GPS and GLONASS to include Europe's Galileo, China's Beidou, and other global navigation systems. Each daily file contains broadcast navigation data in the standard RINEX format for a single ground station.
Files are in RINEX and BIN formats, which require specialized software to parse. The license requires verification from the CDDIS source.