| Title | Electromagnetic fields of oscillating magnetic dipoles placed over a multilayer conducting earth |
| Download | Downloads |
| Author | Sinha, A K; Collet, L S |
| Source | Geological Survey of Canada, Paper 73-25, 1973, 48 pages, https://doi.org/10.4095/102533 |
| Year | 1973 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Subjects | mathematical and computational geology; geophysics; e m interpretations; e m polarization program; magnetic field; e m surveys, airborne; magnetic surveys, airborne; software |
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| Released | 1973 10 01; 2016 02 02 |
| Abstract | The electromagnetic fields from oscillating horizontal and vertical magnetic dipoles are calculated for loops placed above an n-layer earth. The formal solutions for the magnetic fields in air are
presented in terms of three infinite integrals which may be evaluated numerically on a digital computer. A completely generalized computer program for that purpose has been included in this paper. The program has been used to make a detailed analysis
of the polarization characteristics of the fields from airborne vertical and horizontal magnetic dipoles above a multi-layer earth. A number of theoretical curves show the variations of the tilt angle and ellipticity of the polarization ellipses over
several models. Both tilt angle and ellipticity plots show good resolution but ellipticity plots have somewhat higher resolution. Hence both these parameters may be used in the interpretation of airborne electromagnetic mapping data. |
| GEOSCAN ID | 102533 |
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