Evaluation of Terrestrial and Celestial Reference Frames Estimated From VGOS Data .

Other conference contribution, 2025

We use the VGOS data from 2017 until the beginning of 2025 to estimate a Terrestrial Reference Frame (TRF) and a Celestial Reference Frame (CRF). These reference frames are then compared to ITRF2020 u2023 and ICRF3, as well as to a TRF/CRF solution calculated based on legacy S/X VLBI data up to the beginning of 2025. For the TRF, we find agreements on the level of a few millimeters for the VGOS stations with the longest observation spans. For the CRF, the differences are in general a few 100 µas.