On the separation of potential fields as an inverse source problem in geomagnetismMS1

The main challenge with geomagnetic satellite data is the separation into its different contributions. Here, we focus on separating the core magnetic field from the crustal magnetic field by modeling both contributions as potential fields generated on spheres of different radii. Under the assumption that there is a layer of zero conductivity between the two spheres and that the magnetization on the outer sphere is locally supported, we show that the two contributions can be distinguished uniquely from knowledge of the overall magnetic field on a third exterior sphere (satellite orbit). Additionally, we provide an approach to approximating the Fourier coefficients of either contribution.’

This presentation is part of Minisymposium “MS1 - Inverse scattering and electrical impedance tomography (2 parts)
organized by: Nuutti Hyvönen (Aalto University) , Roland Griesmaier (Karlsruhe Institute of Technology) .

Christian Gerhards (University of Vienna)