The International Terrestrial Reference Frame (ITRF) provides a framework for all ground- and space-based measurements that help determine locations on the Earth's surface with high precision. ITRF is realized every few years using the four space geodetic techniques, VLBI, GNSS, SLR, and DORIS. The most recent release, ITRF2020, is expected to be more precise than its predecessor, ITRF2014, which was released in 2016. For the first time, this realization of ITRF includes geodetic products from VLBI Global Observing Systems (VGOS), the next-generation broadband VLBI observing system equipped with fast antennas and wide observing bandwidths. By design, the uncertainties of VGOS observations are significantly smaller than those of its predecessor, the S/X Legacy system. With the inclusion of VGOS observations in ITRF2020, the VGOS network should be compatible and aligned with the S/X Legacy network and other space geodetic techniques. Therefore, one would expect the Earth Orientation Parameters (EOP) estimated from VGOS and S/X Legacy networks to be in good agreement. In this presentation, we will investigate the level of agreement of EOPs estimates from both networks in the ITRF2020, and also in relation to prior realizations such as ITRF2014

American Geophysical Union Fall Meeting, 12-16 December 2022, Chicago

Peer reviewed