| Autor: |
Frayzer Lima de Almeida, Luiz Rijo |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
10th International Congress of the Brazilian Geophysical Society & EXPOGEF 2007, Rio de Janeiro, Brazil, 19-23 November 2007. |
| DOI: |
10.1190/sbgf2007-017 |
| Popis: |
This work presents an algorithm for 3-D inversion of electromagnetic data associated with inductive sources: HMD (horizontal magnetic dipole) and VMD (vertical magnetic dipole). The proposed inversion algorithm is based on the method of Marquardt subsidized by a scheme of normalization of the objective function using the amplitude and phase of the vertical component of the observed magnetic field combined with the absolute constrain of the body’s depth and the conductivity of a region around the body. The forward problem was solved by the finite element method using the three components of the magnetic vector potential plus the electric scalar potential and the Coulomb gauge. The results of the experiments with the three models show that the proposed inversion algorithm, with the imposed constrains, is able to delineate clearly 3-D conductive simple bodies hosted in resistive media. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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