GLONASS Broadcast Ephemeris: Daily 30-Second Navigation Data

NASA CDDIS provides daily files of GLONASS combined broadcast ephemeris data from a global network of ground receivers. The data contains all distinct navigation messages received in one day, sampled at 30-second intervals and stored in the RINEX format. This dataset supports precise positioning, timing, and geodetic research by detailing satellite orbits and clock corrections.

Use Cases

• Precise orbit determination and satellite clock analysis based on broadcast navigation messages.
• Crustal motion and plate tectonics studies using GNSS-derived positioning data.
• Time synchronization applications leveraging the high-precision timing information from satellite signals.
• Comparative analysis of global navigation satellite systems (e.g., GLONASS vs. GPS) based on constellation and signal structure data.

Strengths

• Data originates from the authoritative NASA Crustal Dynamics Data Information System (CDDIS).
• Sourced from a global permanent network of ground-based receivers, suggesting broad spatial coverage.
• Provides daily files with a consistent 30-second sampling rate for temporal continuity.

Limitations

• Critical metadata is missing: specific column names, row counts, and file sizes are unknown across all sources.
• License is ambiguously listed as 'other-license-specified' without detailed terms.
• The stated last update date of '2026-04-10' is in the future, casting doubt on metadata accuracy.

Provenance

Source

NASA Crustal Dynamics Data Information System (CDDIS)

Collection Method

Collected from ground-based GNSS receivers in a global permanent network.

Time Range

One day per file; full temporal range is unspecified.

Freshness

2026-04-10 04:00:01.807234

Geography

Global coverage from a network of ground receivers.