GLONASS Real-Time Clock Corrections: GNSS Satellite Bias Time Series

NASA CDDIS provides a time series of clock biases for healthy GLONASS satellites, accumulated every minute throughout the day. The data are generated in real-time by JPL's Global Differential GPS Operations Centers and include formal 1-sigma uncertainties. This product can be concatenated with other daily files to provide larger temporal coverage.

Use Cases

• Improving real-time positioning accuracy based on precise satellite clock corrections.
• Concatenating daily files for long-term time-series analysis of GLONASS clock performance.
• Assessing formal 1-sigma uncertainties provided with the clock bias estimates.

Strengths

• Data are generated in real-time by a major operational center (JPL's Global Differential GPS Operations Centers).
• Includes formal 1-sigma uncertainty estimates for the clock corrections.
• Data are provided at a high sampling rate of one measurement per minute.

Limitations

• Metadata completeness is low across sources, with missing information on columns, size, rows, license, and author.
• The input contains conflicting descriptions for unrelated datasets (Digital Line Graphs, New Horizons), indicating potential metadata contamination for this specific record.
• The 'last updated' date of 2026-04-10 appears to be a future date, suggesting a system error.

Provenance

Source

NASA Crustal Dynamics Data Information System (CDDIS)

Collection Method

Generated in real-time at JPL's Global Differential GPS Operations Centers.

Time Range

Daily files, concatenable for larger coverage.

Freshness

2026-04-10 19:39:05.868244

Geography

Global (GLONASS constellation).