NASA CDDIS GNSS Data: Global Satellite Positioning Support Information

NASA's Crustal Dynamics Data Information System (CDDIS) archives supporting information for ground-based Global Navigation Satellite System (GNSS) data. The archive includes data primarily from the U.S. GPS and Russian GLONASS systems, and since 2011 has incorporated data from other global and regional systems like Galileo, Beidou, QZSS, IRNSS, and SBAS. More details on these data and products are available on the Earthdata website.

Use Cases

• Analyzing tectonic plate motion based on GNSS-derived positioning data.
• Studying earthquake dynamics and crustal deformation using time-series GNSS measurements.
• Developing or validating precise positioning algorithms using multi-constellation GNSS data.
• Researching atmospheric effects on signal propagation using GNSS data products.

Strengths

• Data originates from NASA's authoritative Crustal Dynamics Data Information System (CDDIS).
• Archive includes multiple global and regional satellite constellations, expanding coverage since 2011.
• Last updated metadata indicates ongoing maintenance as of 2026-03 13.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to the distribution of ground receiver stations.

Provenance

Source

National Aeronautics and Space Administration (NASA), Crustal Dynamics Data Information System (CDDIS).

Collection Method

Collected from a global network of ground-based GNSS receivers.

Time Range

Data holdings include records from at least 2011 onward, based on the description.

Freshness

Last updated 2026-03-13 02:12:49.578583; freshness should be verified.

Geography

Global coverage, as GNSS provides autonomous geo-spatial positioning worldwide.