GP43B-1251
On the accuracy of paleopoles estimations based on magnetic field measurements
Thursday, 17 December 2015
Poster Hall (Moscone South)
Foteini Vervelidou1, Vincent Lesur1, Achim Morschhauser2 and Matthias Grott2, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (2)German Aerospace Center DLR Berlin, Berlin, Germany
Abstract:
We present a new map of Mars magnetization, based on a recently published martian lithospheric magnetic field model (Morschhauser et al., 2014). We obtain this map by means of the vector Spherical Harmonics, following the approach of Gubbins et al., 2011. This formalism has the advantage to alleviate the non-uniquess issue that characterizes the inversion of the observable magnetic field for the underlying magnetization. It does so by separating the part of the magnetization that produces the observable magnetic field from the part of the magnetization that does not. Based on this map, and a series of synthetic tests, we investigate the accuracy to which paleopoles positions can be retrieved from magnetic field measurements. We discuss our results in combination with previous studies on Mars paleopoles positions.
