NASA CDDIS GNSS and Meteorological Data from Global Ground Stations

NASA's Crustal Dynamics Data Information System archives daily files of ground-based GNSS and meteorological data from a global permanent network of receivers. Since 2011, the archive has expanded beyond GPS and GLONASS to include data from Galileo, BeiDou, QZSS, IRNSS, and SBAS systems. Each daily file contains 24 hours of data, such as satellite ephemerides and surface weather measurements, in the standard RINEX format.

Use Cases

• Correcting satellite signal delays for precise positioning based on co-located meteorological data (temperature, pressure, humidity).
• Analyzing crustal motion and plate tectonics using long-term GNSS observation time series from a global network.
• Studying multi-GNSS system performance and interoperability using merged broadcast ephemeris files.
• Calibrating atmospheric models using ground-based meteorological measurements from geodetic sites.

Strengths

• Data originates from NASA's authoritative CDDIS archive, a primary source for global geodetic data.
• Provides a multi-system record since 2011, covering GPS, GLONASS, Galileo, BeiDou, QZSS, IRNSS, and SBAS.
• Offers co-located meteorological measurements, enabling tropospheric delay corrections for high-precision GNSS analysis.

Limitations

• Specific column names, row counts, and dataset sizes are not provided in the available metadata.
• License is listed only as 'other-license-specified', requiring users to investigate terms on the CDDIS website.
• Metadata completeness is medium; detailed schema and precise temporal coverage must be inferred from descriptions.

Provenance

Source

NASA Crustal Dynamics Data Information System (CDDIS)

Collection Method

Collected from a global permanent network of ground-based GNSS receivers, with some merged ephemeris files provided by Technical University of Munich and Deutsches Zentrum für Luft- und Raumfahrt.

Time Range

Archive includes data since at least 2011 for multiple GNSS constellations.

Freshness

Last updated metadata dates range from 2026-04-09 to 2026-04-10, though this may reflect catalog updates, not data currency.

Geography

Global coverage from a network of ground stations.