Global Navigation Satellite System Orbit and Clock Products

Global Navigation Satellite System (GNSS) satellite orbit products consist of daily files generated from real-time analysis center submissions to NASA's Crustal Dynamics Data Information System (CDDIS). The dataset supports the International GNSS Service Multi-GNSS Experiment (MGEX), providing satellite orbit, clock, and station position solutions from multiple global navigation systems including GPS, GLONASS, Galileo, and Beidou. Products are derived from a global permanent network of ground-based receivers and are updated daily.

Use Cases

• Precise satellite orbit determination and prediction using daily orbit solution files.
• Analysis of satellite and ground station clock performance and synchronization.
• Studying crustal motion and plate tectonics through derived station position solutions.
• Multi-GNSS system interoperability research comparing GPS, GLONASS, Galileo, and Beidou data.
• Supporting the International GNSS Service Multi-GNSS Experiment (MGEX) for next-generation navigation systems.

Strengths

• Includes data from multiple global navigation constellations (GPS, GLONASS, Galileo, Beidou, QZSS, IRNSS, SBAS) since 2011.
• Derived from a global permanent network of ground-based receivers, ensuring wide spatial coverage.
• Products are generated and updated daily, providing near-real-time data for analysis.

Limitations

• Specific column names, row counts, and dataset size are not provided by any source.
• Sources disagree on license information: one specifies 'other-license-specified', while another lists 'None'.

Provenance

Source

NASA Crustal Dynamics Data Information System (CDDIS)

Collection Method

Derived from real-time IGS analysis center submissions based on observation data from a global network of ground receivers.

Time Range

Daily files generated since at least 2011 (when multi-GNSS data inclusion began).

Freshness

2026-03-13 01:51:33.685257

Geography

Global coverage from satellite constellations and a global network of ground stations.