Time series of VLBI radio source positions at X-band

Content

Time series of radio source positions at X-band from Very Long Baseline Interferometry.

Number of radio sources with session-wise estimated coordinates:

• 5676 in vie_sx_250816a
• 5675 in vie_sx_250816b

Positions of defining ICRF3sx radio sources which are not included in the respective _sts.txt file (~150) were fixed in the adjustment. About one half of the ICRF3sx defining sources was fixed in vie_sx_250816a solution, the other half in vie_sx_250816b.

Dataset

Time span: vgosDB from 1990.0 until 2025.5
Origin of input data: databases from IVS data center, usno observing program if not from IVS
Software used for analysis: VieVS v4.0

Source coordinates
   - Apriori source coordinates: ICRF3sx
   - Amplitude of Galactocentric acceleration vector: 5.8 uas/yr
   - Epoch of coordinates: 2015.0

More details about the solution are provided in readme_vie_sx_250816_sts.txt file.

General information about the VLBI analysis done at the VIE IVS Analysis Center are given in Krasna et al. (2023)

Acknowledgement

The International VLBI Service for Geodesy and Astrometry (IVS) and all its components are acknowledged for providing VLBI data.