1,3,5,6,5,6,7- 1Collecte Localisation Satellites, Localisation & Orbitographie, Ramonville Saint-Agne, France (gmoreaux@groupcls.com)
- 2NASA, Goddard Space Flight Center, Greenbelt, USA
- 3Research Institute of Geodesy, Topography and Cartography, Zdiby, Czech Republic
- 4ESA, European Space Operations Centre, Darmstadt, Germany
- 5Université Paris Cité, Institut de physique du globe de Paris, CNRS, IGN, F-75005 Paris, France
- 6Université Gustave Eiffel, Géodata Paris, IGN, F-75238 Paris, France
- 7GFZ Helmholtz Centre for Geosciences, Weßling, Germany
The International DORIS Service (IDS) has contributed to the third annual update of the 2020 realization of the International Terrestrial Reference Frame (ITRF2020). As part of this effort, IDS has estimated DORIS station positions and velocities, as well as Earth Rotation Parameters (ERPs), using DORIS data. These computations are based on the latest weekly multi-satellite series from the five IDS Analysis Centers and an IDS Associated Analysis Center, covering data from 2025 and backward 2021. Note that for the first time, the IDS combined series will include daily LOD (Length-Of-Day) estimates.
The primary objectives of this study are to evaluate the DORIS contribution to this update of the ITRF2020 in terms of: (1) geocenter motion and scale, (2) station positions and week-to-week position repeatability, (3) ERPs, and (4) a cumulative position and velocity solution. A particular focus is placed on the LOD estimates and on the impact of including SWOT (Surface Water Ocean Topography) DORIS data.
How to cite: Moreaux, G., Lemoine, F., Capdeville, H., Štěpánek, P., Otten, M., Nahmani, S., Pollet, A., and Schreiner, P.: IDS contribution to the third update of the ITRF2020, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-13383, https://doi.org/10.5194/egusphere-egu26-13383, 2026.
