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IERS Message No. 537                                    October 01, 2025
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ITRF2020-u2024 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-u2024 solution at the
dedicated web site:

https://itrf.ign.fr/en/solutions/ITRF2020-u2024

ITRF2020-u2024 is the second ITRF2020 update, generated by adding four
years (2021.0 - 2025.0) 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-u2024 is certainly benefiting from these
technique improved solutions. Many thanks to a number of institutions
and individuals for their contributions to the ITRF2020-u2024 project.

The ITRF2020-u2024 web site contains the most important results and
information regarding the ITRF2020-u2024 combination. It will be updated
as necessary to add more details and results useful to the ITRF users.

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

Cordially
Zuheir Altamimi
Head, IERS ITRS Center


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