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IERS Message No. 517                                   December 09, 2024
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ITRF2020-u2023 is available on line


Dear ITRF Users and Colleagues,

Three years after its release, the ITRS Center has initiated regular
(yearly) updates of ITRF2020.

The IERS ITRS Center at IGN has the pleasure to announce to the
community the availability of the ITRF2020-u2023 solution at the
dedicated web site:

https://itrf.ign.fr/en/solutions/ITRF2020-u2023

ITRF2020-u2023 is the first ITRF2020 update, generated by adding three
years (2021.0-2024.0) of data after the end of the ITRF2020 input
data.

I want to take this opportunity to acknowledge the enormous efforts of
the IAG Services (IDS, IGS, ILRS, IVS) and their Analysis and
Combination Centers for their contributions by providing extended time
series of station positions and Earth Orientation Parameters (EOPs).
The quality of the ITRF2020-u2023 is certainly benefiting from these
technique improved solutions. Many thanks to a number of institutions
and individuals for their contributions to the ITRF2020-u2023 project.

The ITRF2020-u2023 web site contains the most important results and
information regarding the ITRF2020-u2023 combination. It will be updated
regularly to add more details and results useful to the ITRF users.

For any comment, question or specific request, please contact:
itrf@ign.fr

Cordially
Zuheir Altamimi
Head, IERS ITRS Center


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