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IERS Message No. 531                                      March 14, 2025
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New Chair of IERS Directing Board


In autumn last year, the IERS Directing Board has elected Adrian Jaeggi
as its new Chair. On 1 January 2025 he replaced Tonie van Dam who served
the IERS as chairperson from 2021 to 2024.

Since his start as Director of the Astronomical Institute of the
University of Bern (AIUB, https://www.aiub.unibe.ch) in 2012, Adrian
Jaeggi's main research focus has been on the advancement of
high-precision orbit determination for various scientific applications.
In particular he has also been supporting and promoting AIUB's long-term
contributions to the IAG such as, e.g., the Center for Orbit
Determination in Europe (CODE) global analysis center of the IGS hosted
at the AIUB, the SLR station in Zimmerwald operated by the AIUB in
collaboration with the Swiss Federal Office of Topography (swisstopo),
or the AIUB associated analysis center of the ILRS. Currently, he is
very much interested to contribute to studies on how to rigorously
combine the upcoming Genesis GNSS, SLR, VLBI and DORIS data, addressing
in particular also the combination of the Genesis orbital parameters,
together with the data from the respective ground networks to fully
exploit the change of paradigm that will be offered by this unique
co-location in space mission.

We welcome Adrian Jaeggi to the IERS and would like to thank Tonie van
Dam for her time and many efforts serving the IERS over many years as
chair and later co-chair of the IERS Global Geophysical Fluids Centre,
as a member of the IERS Directing Board and finally as its Chair. Her
cooperation brought many impacts into IERS thanks to her expertise in
geophysics and space geodesy.

Daniela Thaller
Director of the IERS Central Bureau


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