HR: 0800h
AN: G41C-0374 [Abstracts]
TI: Geocenter : notion, definition and realization
AU: Greff-Lefftz, M
EM: greff@ipgp.jussieu.fr
AF: Institut de Physique du Globe de Paris, 4 place Jussieu, Paris, 75005
France
AU: Biancale, R
EM: Richard.Biancale@cnes.fr
AF: GRGS/CNES, 18 avenue Edouard Belin, Toulouse, 31401
France
AU: Cretaux, J
EM: Jean-Francois.Cretaux@cnes.fr
AF: GRGS/CNES, 18 avenue Edouard Belin, Toulouse, 31401
France
AU: Exertier, P
EM: exertier@obs-azur.fr
AF: OCA/CERGA, Avenue Nicolas Copernic, Grasse, 06130
France
AU: Lemoine, J
EM: Jean-Michel.Lemoine@cnes.fr
AF: GRGS/CNES, 18 avenue Edouard Belin, Toulouse, 31401
France
AU: * Loyer, S
EM: Sylvain.Loyer@cnes.fr
AF: GRGS/CNES, 18 avenue Edouard Belin, Toulouse, 31401
France
AU: Legros, H
EM: Hilaire.Legros@eost.u-strasbg.fr
AF: Institut de Physique du Globe de Strasbourg, 5 rue Rene Descartes, Strasbourg, 67084
France
AU: Gegout, P
EM: Pacal.Gegout@eost.u-strasbg.fr
AF: Institut de Physique du Globe de Strasbourg, 5 rue Rene Descartes, Strasbourg, 67084
France
AU: Feissel, M
EM: feissel@ensg.ign.fr
AF: IGN-LAREG, 6-8 avenue Blaise Pascal, Champ sur Marne, 75455
France
AU: Sillard, P
EM: sillard@ensg.ign.fr
AF: IGN-LAREG, 6-8 avenue Blaise Pascal, Champ sur Marne, 75455
France
AB:
Comparison between the geophysical theoretical variations of the geocenter and the ones observed by spatial geodesy is not
trivial:the geodetic community works in a reference frame not centered to the center of mass and the initial reference sphere
used by the geophysicists is not realistic.
Within the frame of the french research group AGRET (Astrometrie, Geodynamique et Systemes de Reference), the geodetic,
geophysical and astronomical communities worked together in order to propose a definition of the geocenter and to establish
the relations between measurements and geophysical reference frame.
We present in this paper the mean conclusions of this working group and we propose some recommendations.
DE: 1214 Geopotential theory and determination (0903)
DE: 1229 Reference systems
SC: Geodesy [G]
MN: Fall Meeting 2005