Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmgp42a..05l&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #GP42A-05
Other
5440 Magnetic Fields And Magnetism, 1517 Magnetic Anomaly Modeling, 1545 Spatial Variations (All Harmonics And Anomalies)
Scientific paper
Using a previously described conjugate gradient technique to compute the magnetization of an equivalent source dipole mesh, we develop a new model of the Martian lithosphere magnetization using Mars Global Surveyor magnetic data acquired during the AeroBraking, Science Phase Orbit and Mapping Orbit phases of the mission. Our new model is compared to previously published ones in terms of fitting the observations. The major improvements with respect to the previous models comes from the use of the raw AB1/2 data instead of the AB-binned one. By comparing solutions derived on partial datasets we discuss about the orientation of the magnetization, which appears to be mostly vertical: assuming a pure vertical magnetization, predicted and observed field components are correlated up to 0.99, 0.98 and 0.96 for Br, Bθ and Bφ , respectively. Using our magnetization model we compute altitude-normalized maps for altitudes ranging between 200 and 400 km. The magnetic field is compared to other physical properties, such as the crater density, the gravity and the topography.
Langlais Benoit
Mandea Mioara
Purucker Michael
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