HR: 0800h
AN: P21B-0149    [Abstracts]
TI: A new Solution of Mars' Time Variable Gravity Field From a Joint Inversion of MEX and MGS Radio-tracking Data
AU: * ROSENBLATT, P
EM: rosenb@oma.be
AF: Royal Observatory of Belgium, Avenue Circulaire, 3, Brussels, B-1180 Belgium
AU: Duron, J
EM: duron@pontos.cst.cnes.fr
AF: Royal Observatory of Belgium, Avenue Circulaire, 3, Brussels, B-1180 Belgium
AU: MARTY, J
EM: jean-charles.marty@cnes.fr
AF: Obervatoire Midi-Pyrenees, 14, avenue E. Belin, Toulouse, F-31401 France
AU: Dehant, V
EM: v.dehant@oma.be
AF: Royal Observatory of Belgium, Avenue Circulaire, 3, Brussels, B-1180 Belgium
AU: PAETZOLD, M
EM: paetzold@geo.Univ-Koeln.DE
AF: Institut fur Geophysik und Meteorologie, Universitaet zu Koeln, albertus-Magnus-Platz, Koeln, D-50923 Germany
AU: Haeusler, B
EM: bernd.haeusler@univbw-muenchen.de
AF: Institut fur Raumfahrttechnik, Universitaet der Bundeswehr Muenchen, Werner-Heisenberg-Weg, 39, Neubiberg, D-85577 Germany
AU: LE MAISTRE, S
EM: smaistre@oma.be
AF: Royal Observatory of Belgium, Avenue Circulaire, 3, Brussels, B-1180 Belgium
AU: KARATEKIN, O
EM: o.karatekin@oma.be
AF: Royal Observatory of Belgium, Avenue Circulaire, 3, Brussels, B-1180 Belgium
AU: VAN HOOLST, T
EM: Tim.Vanhoolst@oma.be
AF: Royal Observatory of Belgium, Avenue Circulaire, 3, Brussels, B-1180 Belgium
AU: Balmino, G
EM: georges.balmino@cnes.fr
AF: Obervatoire Midi-Pyrenees, 14, avenue E. Belin, Toulouse, F-31401 France
AB: The MEX orbit is quite different from the MGS orbit (ellipticity of 0.6 against 0.01), and thus offers a unique opportunity to improve solutions of the time-variable gravity field of Mars (mainly) obtained from MGS orbiter tracking data. By using almost 2 years of MaRS radio tracking of MEX, an accurate MEX orbit is estimated and solutions for time variable zonal coefficients (J2 to J5) are presented. Then the MEX tracking data are also stacked with the MGS data to obtain new solutions of J2 to J5 variations. This new solution is compared with estimates from Global Circulation Model and from data of the HEND experiment onboard Mars Odyssey.
DE: 1217 Time variable gravity (7223, 7230)
DE: 1221 Lunar and planetary geodesy and gravity (5417, 5450, 5714, 5744, 6019, 6250)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 5417 Gravitational fields (1221)
DE: 6225 Mars
SC: Planetary Sciences [P]
MN: Fall Meeting 2005