NASA CDDIS Ground-Based GNSS Real-Time Data Streams

NASA's Crustal Dynamics Data Information System provides real-time streams of Global Navigation Satellite System data sampled at 1 to multi-second intervals. The dataset includes observations from a global permanent network of ground receivers, capturing signals from GPS, GLONASS, Galileo, Beidou, and other systems since at least 2015. Data is transmitted in raw receiver or RTCM format.

Use Cases

• Analyzing real-time satellite signal quality and availability across multiple GNSS constellations.
• Developing and testing algorithms for precise point positioning using raw receiver data streams.
• Monitoring tectonic plate motion and crustal deformation with high-frequency ground station observations.
• Calibrating satellite-based augmentation systems (SBAS) using a global network of reference stations.
• Studying ionospheric and tropospheric delays on GNSS signals for atmospheric research.

Strengths

• Provides data from a global permanent network of ground-based receivers, ensuring wide spatial coverage.
• Includes multiple GNSS constellations (GPS, GLONASS, Galileo, Beidou, QZSS, IRNSS, SBAS) since 2015.
• Offers high temporal resolution with data streams sampled at 1 to multi-second intervals.

Limitations

• Specific column names, row counts, and dataset size are not provided by any source.
• Sources conflict on license: one specifies 'other-license-specified', while another lists it as null.
• The precise start date for the full multi-GNSS stream is implied but not explicitly stated.

Provenance

Source

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

Collection Method

Transmitted from a global permanent network of ground-based receivers in raw receiver or RTCM format.

Time Range

Since at least 2015 for multi-GNSS data.

Freshness

2026-03-13 01:37:26.182886

Geography

Global coverage