ILRS v101 contribution to ITRF2020-u2025

This dataset contains the official International Laser Ranging Service (ILRS) contribution to the ITRF2020-u2025 reprocessing campaign. The contribution comprises combined Satellite Laser Ranging (SLR) products generated from the individual solutions of the ILRS Analysis Centers and combined by the ILRS Combination Centers for submission to the International Earth Rotation and Reference Systems Service (IERS). Until September 2022, the combined solutions are based on observations to the four geodetic satellites LAGEOS-1, LAGEOS-2, Etalon-1, and Etalon-2. From September 2022 onwards, observations to LARES-2 are additionally included in the combined solutions. Overall, this submission comprises weekly combined SINEX solutions covering the full reprocessing period from 2021.0 to 2026.0. The ILRS internal identifier for this reprocessing campaign is v101. The published dataset consists of two gzip-compressed TAR archives: ilrsa.pos+eop.v101.sinex_files.tar.gz Weekly SINEX files containing loosely constrained station coordinates, daily Earth Orientation Parameters (polar motion and Length-of-Day offsets), and weekly station-dependent range biases estimated for selected stations. ilrsa.eop.v101.sinex_files.tar.gz Weekly SINEX files containing daily Earth Orientation Parameters (polar motion and Length-of-Day offsets) derived from a minimum-constrained terrestrial reference frame (TRF) solution. The dataset provides the official ILRS contribution to the ITRF2020-u2025 realization and is intended for the realization and evaluation of terrestrial reference frames (TRFs) and Earth Orientation Parameters (EOPs).