IGS GNSS Ultra-Rapid, Rapid, and Final Orbit Products

NASA CDDIS hosts precise satellite orbit and clock products from the International GNSS Service (IGS). These products are generated by IGS Analysis Centers on sub-daily (ultra-rapid), daily (rapid), and weekly (final) schedules, providing satellite position, velocity, and clock data. The data supports applications requiring high-precision geodetic measurements, including station coordinate determination and Earth orientation parameter estimation.

Use Cases

• Determining precise coordinates of GNSS observing stations based on satellite orbit and clock products.
• Estimating Earth orientation parameters using the high-quality IGS Final orbit products.
• Supporting real-time and near real-time applications with predicted orbit information from Ultra-Rapid products.
• Calculating gravity field parameters using precise satellite position and velocity data.
• Establishing the IGS reference frame, which relies on the consistency of the Final combined orbit solutions.

Strengths

• Products are generated by multiple International GNSS Service Analysis Centers and combined for official IGS products, indicating a multi-source, consensus-driven process.
• Data is produced on multiple schedules (ultra-rapid, rapid, final) to serve applications with different latency and precision requirements.

Limitations

• Column names and specific data structure are not provided in any source, limiting understanding of the internal schema.
• Row counts, file sizes, and detailed update frequencies are not specified, making it difficult to assess data volume and timeliness.
• The license is ambiguously listed as 'other-license-specified' without further details.

Provenance

Source

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

Collection Method

Derived from analysis of Global Navigation Satellite System (GNSS) data retrieved on regular schedules.

Freshness

2026-04-10 (from datagov platform)

Geography

Global