Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005geoji.161...81v&link_type=abstract
Geophysical Journal International, Volume 161, Issue 7, pp. 81-101.
Physics
12
Scientific paper
We introduce a time-domain method to solve the problem of geomagnetic induction in a heterogeneous Earth excited by variations of the ionospheric and magnetospheric currents with arbitrary spatiotemporal characteristics. The problem is formulated in the integral sense. The Galerkin discretization is based on the vector spherical harmonic functions and piecewise linear finite elements in the angular and radial directions, respectively. A semi-implicit time integration scheme is employed. The method is validated against semi-analytical (SA) solutions for conductivity models consisting of multiple eccentrically nested homogeneous spheres.
Martinec Zdeněk.
Velímský Jakub
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