GPS Satellite Clock Bias Corrections With Real-Time Updates

JPL's Global Differential GPS Operations Centers generate high-rate, real-time clock bias corrections for healthy GPS satellites, sampled every minute. The data is provided as daily files with 1-second sampling and includes formal 1-sigma uncertainty estimates for each correction. This dataset is maintained by NASA's CDDIS and updated daily.

Use Cases

• Improving real-time precise point positioning (PPP) by applying clock bias corrections to GPS satellite signals.
• Analyzing the stability and performance of GPS satellite atomic clocks over time using the minute-by-minute bias time series.
• Concatenating daily files to create long-term time series for studying trends in satellite clock behavior.
• Assessing the formal 1-sigma uncertainty values provided with each correction to gauge data quality for specific satellites.

Strengths

• Provides high-rate, real-time data with a sampling interval of one minute.
• Includes formal 1-sigma uncertainty estimates for each clock bias correction, quantifying error.
• Generated by JPL's operational centers, indicating a reliable and standardized production process.

Limitations

• Specific column names and the total row count per file are not documented on any platform.
• The exact license terms are unclear, only specified as 'other-license-specified'.
• Data is limited to healthy satellites in the GPS constellation.

Provenance

Source

NASA CDDIS, generated by JPL's Global Differential GPS Operations Centers.

Collection Method

Real-time generation from ground-based GNSS observations.

Time Range

Daily files, concatenatable for larger temporal coverage.

Freshness

2026-03-13 01:43:55.644702

Geography

Global coverage of the GPS satellite constellation.