HR: 11:05h
AN: G42A-04 INVITED     [Abstracts]
TI: Physics of the Earth outer core and inner core from VLBI
AU: * Dehant, V M
EM: v.dehant@oma.be
AF: Royal Observatory of Belgium, 3 avenue Circulaire, Brussels, B1180, Belgium
AU: Lambert, S B
EM: sebastien.lambert@oma.be
AF: Royal Observatory of Belgium, 3 avenue Circulaire, Brussels, B1180, Belgium
AB: We used several existing and homemade nutation series derived from VLBI delays using different analysis strategies. Residuals with respect to the MHB 2000 nutation model corrected from atmospheric effects have been analyzed in order to retrieve Earth's interior parameters. The method is based on the transfer function expressing the ratio between rigid and non rigid nutations. In particular we have examined the value of the FCN resonant period and quality factor in terms of physics of the Earth's core and the accuracy with which the parameters can be retrieved considering the current VLBI developments. We have also looked at the inner core parameters and have determined the impact of VLBI uncertainties of the physics of the inner core, and in particular on the inner core magnetic field.
DE: 1200 GEODESY AND GRAVITY
DE: 1213 Earth's interior: dynamics (1507, 7207, 7208, 8115, 8120)
DE: 1229 Reference systems
DE: 1239 Earth rotation variations
SC: Geodesy [G]
MN: 2007 Joint Assembly