GLONASS Satellite Clock Corrections with Real-Time Uncertainty

NASA CDDIS provides a high-rate time series of clock bias corrections for healthy GLONASS satellites, generated every minute by JPL's Global Differential GPS Operations Centers. The dataset includes formal 1-sigma uncertainties for each correction and is designed for real-time use. Daily files can be concatenated to extend temporal coverage.

Use Cases

• Analyzing the stability and performance of GLONASS satellite atomic clocks over time using the minute-by-minute bias data.
• Improving real-time precise point positioning (PPP) solutions by applying the provided clock corrections and their formal uncertainties.
• Concatenating daily files to study long-term trends in GLONASS system time offset and satellite clock behavior.
• Calibrating other timing or geodetic measurement systems against the GLONASS constellation reference.

Strengths

• Provides formal 1-sigma uncertainty estimates for each clock correction, enabling error analysis.
• Data is generated in real-time by JPL's operational centers, supporting time-critical applications.
• High temporal resolution with corrections accumulated every minute allows for detailed time-series analysis.

Limitations

• Specific column names, row counts, and file sizes are not provided by any source, limiting detailed assessment of structure and volume.
• Sources conflict on license details, with some specifying 'other-license-specified' and others listing 'None'.
• The exact set of 'healthy' satellites included may vary daily and is not explicitly defined.

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 monitoring networks as part of the GUARDIAN system.

Time Range

Daily files; concatenation possible for larger coverage.

Freshness

2026-03-13 01:44:11.963633

Geography

Global coverage of the GLONASS satellite constellation.