On the application of the coupled finite-infinite element method to geodetic boundary-value problem |
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Authors: | Michal ?prlák Zuzana Fa?ková Karol Mikula |
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Institution: | (1) Western Australian Centre for Geodesy, Curtin University of Technology, GPO Box U1987, Perth, WA, 6845, Australia;(2) Raytheon ITSS, 1616 McCormick Drive, Upper Marlboro, MD 20774, USA;(3) Department of Geodesy and Geomatics Engineering, University of New Brunswick, PO Box 4400, Fredericton, E3B 5A3, NB, Canada |
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Abstract: | Our aim is to introduce the Coupled Finite-Infinite Element Method (CFIEM) as a new alternative approach to the Earth’s gravity
field modelling. We show that if the computational domain is large enough in radial direction, one can obtain the qualitatively
and quantitatively comparable solution to the solution by the Finite Element Method (FEM). We study the influence of the size
of the computational domain on the final CFIEM solution as well as the successive refinement of the discretization and its
convergence to the exact solution. As an input data we use the synthetic boundary conditions computed from a Synthetic Earth
Gravity Model (SEGM) and we test the CFIEM solution by the data generated directly from SEGM and the solution by the FEM. |
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