Forward and inverse modelling methods for electromagnetic surface impedance

David V. Thiel; Daniel A. James; Glenn A. Wilson

doi:10.1071/ASEG2001ab140

ISSN: 2202-0586
E-ISSN:

oa Forward and inverse modelling methods for electromagnetic surface impedance
Authors David V. Thiel^a, Daniel A. James^b and Glenn A. Wilson^c
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^a Radio Science Laboratory School of Microelectronic Engineering Griffith University, Australia, [email protected] ^b Radio Science Laboratory School of Microelectronic Engineering Griffith University, Australia, [email protected] ^c Radio Science Laboratory School of Microelectronic Engineering Griffith University, Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2001, Issue ASEG2001 - 15th Geophysical Conference, Dec 2001, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2001ab140
- Published online: 01 Dec 2001

Abstract

Low frequency computer modelling of the surface impedance response of subsurface structures is time intensive. Consequently automated three-dimensional inversion remains unrealistic. In this paper, a Genetic Algorithm least squares minimization routine was applied to a one-dimension model and results used to seed two-dimensional surface impedance data. The Impedance (IM) method is shown to be an efficient numerical solution engine in the inversion method.

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2001-12-01

2026-01-16

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References

James D.A., O'Keefe S.G. and Thiel D.V., 1999, Eddy current modelling using the impedance method for surface impedance profiling, IEEE Transactions on Magnetics, 35, 1107-1110.
Hohmann G.W., 1987, Numerical modeling for electromagnetic methods of geophysics in Nabighian M.N., Electromagnetic Methods in Applied Geophysics, Vol. 1, Society of Exploration Geophysicists, 313-364.
Hohmann G.W., Raiche A.P., 1987, Inversion of controlled-source electromagnetic data in Nabighian M.N., Electromagnetic Methods in Applied Geophysics, Vol. 1, Society of Exploration Geophysicists, 469-504.
Thiel D.V. and Mittra R., 2001, A self-consistent impedance method for electromagnetic surface impedance modelling, Radio Science, 36 (1) (in press).
Wait J.R., 1970, Electromagnetic waves in stratified media, Second Ed., Pergamon Press, Oxford.
Houck C.R., 1996, A Genetic Algorithmn for Function Optimisation: A Matlab Implementation, GNU General Public License

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Article Type: Research Article

Keyword(s): electromagnetic geophysics; genetic algorithms; impedance method; inverse model; surface impedance

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oa Forward and inverse modelling methods for electromagnetic surface impedance

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