- 1NERC Space Geodesy Facility, Hailsham, East Sussex, United Kingdom of Great Britain – England, Scotland, Wales (andsni@bgs.ac.uk)
- 2Collecte Localisation Satellite (CLS), Ramonville St. Agne, France (gmoreaux@groupcls.com)
- 3Department of Surveying and Geomatics Engineering, International Hellenic University Terma Magnisias, Serres-Greece, PC 62124 (dampatzi@ihu.gr)
- 4Technische Universität Wien (TU Wien), Vienna, Austria (Hana.Krasna@geo.tuwien.ac.at)
- 5Astronomical Institute, University of Bern, Switzerland (linda.geisser@unibe.ch)
- 6Deutsches Geodaetisches Forschungsinstitut der Technischen Universitaet Muenchen (DGFI-TUM) (manuela.seitz@tum.de)
In mid-2024, the IAG-IERS Joint Working Group 1.2.4 was established to complement the evaluation of the International Terrestrial Reference System (ITRS) realizations by the three ITRS combination centres (CC) of IERS with a special focus on the intercomparison of different global Terrestrial Reference Frame (TRF) solutions. The assessment aims at investigating conceptual differences of the three global ITRS realizations based on today’s user and application requirements. The main objectives of the JWG 1.2.4 include (i) the comparison of the combination strategies followed by the IERS ITRS CC; (ii) the assessment/quantification of station position time series differences between the ITRS realizations and w.r.t. geophysical models (e.g., loading displacements): (iii) the development and promotion of alternative rigorous (and independent) methods for the intercomparison of global TRF solutions (e.g., POD of low-, medium- and high-Earth-orbiting satellites); (iv) the development of methods and procedures for the quality control of TRF solutions.
Following a brief presentation of the structure of the JWG, we will give a status of its current activities. Then, we will introduce some of the benchmarks the JWG has identified to assess the quality of both global and regional TRF solutions. Finally, these benchmarks will be illustrated by their use on the latest ITRS 2020 realizations.
How to cite: Susnik, A., Moreaux, G., Ampatzidis, D., Krasna, H., Geisser, L., and Seitz, M.: IAG-IERS Joint Working Group 1.2.4 on the evaluation of the Terrestrial Reference Frames, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-16930, https://doi.org/10.5194/egusphere-egu25-16930, 2025.
