HR: 0800h
AN: GP31A-0825    [Abstracts]
TI: Electromagnetic induction transfer functions estimated from Oersted, CHAMP and SAC-C missions
AU: * Balasis, G
EM: gbalasis@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473 Germany
AU: Egbert, G D
EM: egbert@coas.oregonstate.edu
AF: College of Oceanic and Atmospheric Sciences, Oregon State University, Oceanography Administration Building 104, Corvallis, OR 97331-5503 United States
AU: Maus, S
EM: Stefan.Maus@noaa.gov
AF: CIRES, University of Colorado and National Geophysical Data Center, National Oceanographic and Atmospheric Administration, E/GC1, 325 Broadway, Boulder, CO 80305-3328 United States
AB: Electromagnetic induction studies using Oersted, CHAMP and SAC-C satellites' magnetic data will ultimately provide important new constraints on the electrical conductivity of Earth's mantle. In contrast to the spatially sparse geomagnetic observatory data, which provide the basis for most of our present knowledge about deep Earth conductivity, data collected from these satellites provide a full coverage of the Earth with 30 degree spacing every day. Electromagnetic induction transfer functions estimated from Oersted, CHAMP and SAC-C magnetic observations, using robust processing and wavelet techniques, will be shown and a comparison of them will be given. Additionally, an important issue in the emergent field of electromagnetic induction studies with magnetic satellite data, namely the assumed morphology of the external source fields will be discussed.
DE: 2778 Ring current
DE: 1515 Geomagnetic induction
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2004 AGU Fall Meeting