Galileo Satellite Clock Corrections with Real-Time Bias Data

Global Galileo constellation data provides a time series of clock biases and their 1-sigma uncertainties for healthy satellites, accumulated every minute. The dataset is generated in real-time by NASA's Jet Propulsion Laboratory Global Differential GPS Operations Centers and can be concatenated daily for extended temporal coverage. It originates from the GUARDIAN network and is distributed via NASA's CDDIS.

Use Cases

• Precise Orbit Determination (POD) by integrating minute-by-minute clock bias corrections.
• Improving real-time GNSS positioning accuracy using formal uncertainty estimates for each correction.
• Studying satellite clock performance and stability trends over time for the Galileo constellation.
• Supporting atmospheric research by providing precise timing data for signal delay calculations.

Strengths

• Provides formal 1-sigma uncertainty estimates for each clock bias correction, enabling error analysis.
• Data is generated in real-time at a specialized JPL operations center, indicating operational reliability.
• Minute-level sampling offers high temporal resolution for studying short-term clock variations.

Limitations

• Specific column names, row counts, and total dataset size are not documented on any platform.
• License is listed as 'other-license-specified' on Data.gov but is 'None' on NASA Earthdata, creating a conflict.
• The extensive tag list from one Data.gov entry appears overly broad and generic for this specific dataset.

Provenance

Source

National Aeronautics and Space Administration (NASA), Jet Propulsion Laboratory (JPL) Global Differential GPS Operations Centers.

Collection Method

Generated in real-time as part of the Ground-Based GNSS-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN).

Time Range

Daily files with 24-hour coverage; concatenation possible for longer time ranges.

Freshness

2026-03-13 01:34:56.809869

Geography

Global, covering the entire Galileo satellite constellation.