Terms of reference
The subjects of study that the Sub-commission supports and promotes can be
summarized, without claim to completeness, as follows. Research work in the
spatial domain concentrates on:
- Global and regional gravity modelling
- Topographic/isostatic modelling
- Downward and upward continuation problems
- Boundary value problem approaches
- Spectral techniques like (but not limited to) spherical harmonics
- Height theory and height systems
- Geodetic aspects of satellite radar altimetry
Studies in the temporal domain of the gravity field include, among others, the following:
- Tides
- The effect of postglacial land uplift
- Time derivatives of the Jn
- Short/medium term gravity change due to movements of air and water
- Anthropogenic gravity changes.
Steering Committee
Bernard Ducarme
Michael Kuhn
Dimitrios Tsoulis
Bernhard Heck
Zdenek Martinec
Christopher Kotsakis
Collected references
These are references for the period in which the Subcommission
has functioned, in the fields falling under its Terms of Reference.
Follow this link.
Subcommission meeting in Porto 2004
Present: Christopher Kotsakis, Jaakko Mäkinen, Dimitirios Tsoulis, E.J.O. Schrama, Michael Kuhn,
Petr Holota, Gunter Finn, Hussein Abdelmotaal
The following actions were discussed / decided upon:
- A list of references should be maintained and placed on the Web site
- A list of members should also be placed there
- Links to relevant datasets
Upcoming meetings:
- Cairns, Australia 2005
- Istanbul, Turkey 2006
- Upcoming summer school in Como on "Geophysical Geodesy"
A further action which was brought forward by E.J.O. Schrama:
Recommendations for temporal reductions in gravity
and tidal observations should be formulated.
Subcommission meeting in Cairns 2005
Present: Dan Roman, Luciana Fenoglio, Ernst J.O. Schrama, Michael Kuhn,
Hussein Abd-Elmotaal, Roland Schmidt, Thomas Gruber, Pieter Visser,
Jaakko Mäkinen, Mattias Becker
Report on work done since Porto:
- Collection of references on this web site: done.
- The Steering committee is now listed on the web site: done.
- A list of relevant data sets: Not done.
- Recommendations for temporal reductions: Not done.
The Porto Proceedings have appeared.
Upcoming meeting: Istanbul 2006.
A discussion took place on formulating a recommendation for gravimetric
reductions. Pieter visser suggested the use of the GRACE models.
Thomas Gruber remarked that recommendations are available on the
ESA website for GRACE and GOCE.
Jaakko Mäkinen mentioned IAG's own standards as written up by
Boedeker in 1988 (reduction to standard atmosphere, etc.)
In the future, this work will undoubtedly be related to GGOS.