CDDIS GNSS Products: Ultra-Rapid Satellite Orbits for Real-Time Positioning

Precise satellite orbits derived from Global Navigation Satellite System (GNSS) data by International GNSS Service (IGS) Analysis Centers. The ultra-rapid products are generated sub-daily and include predicted orbit information for real-time and near-real-time use. These orbits are available from the NASA Crustal Dynamics Data Information System (CDDIS) and were last updated on 2026-04 10.

Use Cases

• Determining precise coordinates of ground-based observing stations based on the precise orbit data.
• Estimating Earth orientation parameters based on the satellite position and velocity information.
• Calculating gravity field parameters using the derived precise satellite orbits.
• Supporting real-time and near-real-time positioning applications based on the ultra-rapid product's predicted orbits.

Strengths

• Data is produced by the official International GNSS Service (IGS) and its Analysis Centers.
• Ultra-rapid products are generated sub-daily, supporting real-time applications.
• Orbits are available from the NASA Crustal Dynamics Data Information System (CDDIS).

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.

Provenance

Source

International GNSS Service (IGS) Analysis Centers, coordinated by the IGS Analysis Center Coordinator.

Collection Method

Analysis Centers retrieve GNSS data on regular schedules to produce precise orbits; the coordinator generates combined products.

Time Range

Ultra-rapid products are generated sub-daily.

Freshness

Last updated 2026-04-10 19:43:38.444854; freshness should be verified.

Geography

Global coverage from GNSS satellite constellations.