************************************************************************ IERS Message No. 464 December 06, 2022 ************************************************************************ Session on Terrestrial Reference Frame at EGU 2023 Dear Colleagues, The next General Assembly of the European Geosciences Union will be held in Vienna and online, on April 23-28, 2023. We would like to draw your attention to the session G.2.2 Terrestrial Reference Frame: data analysis, evaluation and applications and encourage you to join us and submit an abstract to the session! Note that the abstract submission deadline is Tuesday, 10 January 2023, 13:00 CET. Best regards, Kristel Chanard On behalf of the G.2.2 conveners, Claudio Abbondanza, Mathis Blossfeld and Susanne Glaser. G.2.2 Terrestrial Reference Frame: data analysis, evaluation and applications The Terrestrial Reference Frame (TRF) is critical for monitoring the Earth's rotation in space, as well as for many geoscientific applications that need absolute positioning and exact orbit determination of near-Earth artificial satellites. Its new realization, the ITRF2020 has been released based on the combination of DORIS, GNSS, SLR, and VLBI station coordinate time series provided by the IAG/IERS Technique Services. The objective of this session is to bring together contributions from individual Technique Services, space geodetic data analysts, ITRS combination centres and all ITRF users, with a broad range of applications from geosciences to society, to discuss the results and scientific applications of ITRF2020 and other realizations. The assessment of observed non-linear, and particularly periodic, station motions through space geodetic techniques by comparison with physics-based deformation models is of particular interest. Moreover, contributions to geocenter motion determination are encouraged. Finally, contributions that focus on identifying and mitigating technique-related systematic errors as well as different combination strategies, e.g., space and tropospheric ties are encouraged because they may potentially enhance future ITRF solutions. ************************************************************************ IERS Messages are edited and distributed by the IERS Central Bureau. If not stated otherwise, the IERS is only the distributor of the message and is not responsible for its content. To submit texts for distribution, please write to . To subscribe or unsubscribe, please create an IERS account or modify it: https://www.iers.org/Login/Login/EN/login_node.html or write to . Archives: http://www.iers.org/IERS/Messages ************************************************************************