Paris Observatory Geodetic VLBI Center

Radio source coordinate time series 2026b

The coordinate time series of radio sources are computed with two specific analysis configurations. The most common one is the independent mode, updated as new observations arrive at the data center. In this configuration, only S/X multibaseline experiments are used. The second configuration (global mode) is made up of four global solutions, treating one fourth of the sources as arc parameters. The latter series are more accurate but are updated only once a year or so and contains only S/X multibaseline experiments. Below is the list of sources available. The source name color indicates the length of the observational history (darker means shorter). The ICRF3 defining sources are underlined. Plots are available for sources observed in more than 100 sessions. The full sets of time series are available below in a single tarball in two versions:

• Operational series and constantly updated,
• Series of higher precision obtained from 4 global solutions and updated only few times per year.