Galileo Satellite Real-Time Clock Bias Corrections from NASA CDDIS

Clock biases and their formal 1-sigma uncertainties for healthy Galileo constellation satellites, accumulated every minute. The time-series data is generated in real-time by JPL's Global Differential GPS Operations Centers and distributed as daily files by NASA's CDDIS. Daily files can be concatenated to extend temporal coverage.

Use Cases

• Improving real-time Precise Point Positioning (PPP) by applying clock bias corrections referenced in the time-series.
• Monitoring Galileo satellite clock performance and stability using the minute-by-minute bias data.
• Enhancing orbit determination and time transfer studies by integrating the provided clock correction uncertainties.
• Supporting atmospheric studies that rely on precise GNSS signal timing by accounting for satellite clock errors.

Strengths

• Provides formal 1-sigma uncertainty estimates for each clock bias correction, enabling error analysis.
• Data is generated and distributed in real-time, supporting time-critical applications.
• Minute-by-minute sampling offers high temporal resolution for tracking clock behavior.

Limitations

• Specific column names, row counts, and total dataset size are not provided by any source.
• Sources conflict on license details, with some specifying 'other-license-specified' and others listing 'None'.

Provenance

Source

NASA Crustal Dynamics Data Information System (CDDIS), generated by JPL's Global Differential GPS Operations Centers.

Collection Method

Real-time generation from ground-based GNSS observations as part of the GUARDIAN network.

Time Range

Coverage is daily, with files designed to be concatenated for longer time spans.

Freshness

Last updated on 2026-03-13 according to two platforms.

Geography

Global coverage for the Galileo satellite constellation.