[IGSMAIL-8641] EGU - Call for Abstracts for G2.5 "Precise Orbit Determination for Geodesy and Earth Science"

[Heike Peter]

Dear colleagues,

We would like to draw your attention to session G2.5 "Precise Orbit 
Determination for Geodesy and Earth Science" to be held at the next EGU 
General Assembly in Vienna, Austria & online, 3-8 May 2026. See the 
session description below or at:
https://www.egu26.eu/session/58100

Please consider submitting an abstract to this session, and note the 
abstract submission deadline: Thursday, 15 January 2026, 13:00 CET.

Best regards,
The convener team: Heike Peter, Daniel Arnold, Alexandre Couhert, Jose 
van den IJssel, Frank G. Lemoine

Session description:
Precise orbit determination is of central importance for many 
applications of geodesy and earth science. The challenge is to determine 
satellite orbits in an absolute sense at the centimeter or even 
sub-centimeter level, and at the millimeter or even sub-millimeter level 
in a relative sense. Four constellations of GNSS satellites are 
available and numerous position-critical missions (e.g. altimetry, 
gravity, SAR and SLR missions) are currently in orbit. Altogether, 
outstanding data are available offering new opportunities to push orbit 
determination to the limit and to explore new applications.

This session aims to make accessible the technical challenges of orbit 
determination and modelling to the wider community and to quantify the 
nature of the impact of dynamics errors on the various applications.
Contributions are solicited from, but not limited to, the following
areas: (1) precise orbit determination and validation; (2) satellite 
surface force modelling; (3) advances in modelling atmospheric density 
and in atmospheric gravity; (4) advances in modelling earth radiation 
fluxes and their interaction with space vehicles; (5) analysis of 
changes in geodetic parameters/earth models resulting from improved 
force modelling/orbit determination methods; (6) improvements in 
observable modelling for all tracking systems, e.g. SLR, DORIS, GNSS and 
their impact on orbit determination; (7) advances in combining the 
different tracking systems for orbit determination; (8) the impact of 
improved clock modelling methods/space clocks on precise orbit 
determination; (9) advances in modelling satellite attitude; (10) 
simulation studies for the planned co-location of geodetic techniques in 
space mission GENESIS.


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Dr. Heike Peter
Senior Consultant
PosiTim UG
Germany
Tel.: +49 2255 9239616
Fax: +49 2255 9239615