************************************************************************ IERS Message No. 558 June 16, 2026 ************************************************************************ CfP for Genesis IAG/ESA Combination Pilot Project Dear Colleagues, the upcoming Genesis mission requires for the first time a rigorous combination of the satellite orbit in the ITRF-combination. In order to test and assess the feasibility of procedures for orbit combination at normal equation level, the IAG WG 1.1.1 jointly with the ESA Genesis WG 1 issue a Call for Participation for a Combination Pilot Project that you find at this link: https://colab.tuwien.ac.at/spaces/GW/pages/637764156/PP-Combination We are looking forward to a participation of multiple expert groups, joining efforts for finding optimum procedures for consistent realization of a future ITRF containing Genesis observations. Please reply to the call until 17.07.2026 or at your earliest convenience. Best regards Urs Hugentobler ************************************************************************ 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 ************************************************************************