VGOS DB VLBI Level 2 Geodetic And Astrometric Data

The dataset contains Very Long Baseline Interferometry (VLBI) Level 2 observational and supporting data in the VLBI Global Observing System (VGOS) DB format. It is composed of geodetic and astrometric data, including observations, standard deviations, and station coordinates, stored as NetCDF and ASCII files per 24-hour session. The data is collected by the International VLBI Service for Geodesy and Astrometry (IVS) and archived by NASA's Crustal Dynamics Data Information System (CDDIS).

Use Cases

• Analyzing Earth orientation parameters using session-based observation data and standard deviations.
• Studying station coordinate changes over time using geodetic VLBI measurements.
• Processing celestial reference frame data from 24-hour VLBI sessions.
• Validating derived geodetic products against level 2 observational data.

Strengths

• Data adheres to the international IVS standard format (vgosDB) for storing and archiving VLBI data.
• Each data session typically contains a full 24-hours of geodetic and astrometric observations.
• The dataset is hosted and maintained by NASA's authoritative CDDIS archive.

Limitations

• Specific row counts, file sizes, and complete column names are not provided by any source.
• Sources conflict on license details, with one specifying 'other-license-specified' and another listing 'None'.
• The exact temporal range of the data collection is not specified.

Provenance

Source

International VLBI Service for Geodesy and Astrometry (IVS), archived by NASA CDDIS.

Collection Method

Geodetic and astrometric observations collected via the Very Long Baseline Array (VLBI) network.

Freshness

2026-03-12 20:06:06.755923

Geography

Global, based on the VLBI Global Observing System network.