GNSS Real-Time Satellite and Receiver Clock Combination Product from NASA CDDIS

NASA's Crustal Dynamics Data Information System provides a daily, 30-second granularity combination product of Global Navigation Satellite System satellite and receiver clock corrections. This dataset supports the International GNSS Service Real-Time Service, integrating data from GPS, GLONASS, Galileo, Beidou, QZSS, IRNSS, and SBAS constellations. The data is generated from real-time streams of a global receiver network and formatted according to the RTCM SSR standard for broadcast via the NTRIP protocol.

Use Cases

• Real-time precise point positioning based on satellite orbit and clock corrections.
• Quality assessment of IGS Real-Time Service streams by comparing them to rapid products.
• Analyzing temporal stability and errors in GNSS satellite clocks using 30-second interval data.
• Enhancing autonomous geo-spatial positioning applications for global coverage.

Strengths

• Data is generated daily from a global permanent network of ground-based receivers, ensuring continuous coverage.
• Includes data from multiple global and regional satellite constellations (GPS, GLONASS, Galileo, Beidou, QZSS, IRNSS, SBAS) since 2011.
• Products are combination solutions from multiple International GNSS Service analysis centers, likely improving accuracy.

Limitations

• Key metadata such as row count, file size, and specific column names are not provided across any source.
• The license is ambiguously listed as 'other-license-specified' without further details.
• Dataset descriptions are highly repetitive across entries, suggesting potential duplication or poor metadata management.

Provenance

Source

NASA Crustal Dynamics Data Information System (CDDIS)

Collection Method

Derived from real-time IGS analysis center submissions, combined by the IGS Real-Time Analysis Center Coordinator.

Time Range

Data is generated daily; archive includes other GNSS data since 2011.

Freshness

2026-04-10 02:45:09.005189

Geography

Global coverage from a network of ground-based receivers.