Analysis of source location errors for a magnetic dipole buried in a laterally inhomogeneous conducting earth
- 52 Downloads
A numerical model is used to simulate a vertical magnetic dipole (VMD), with time harmonic excitation, buried under a segmented overburden. Results are presented in terms of readily measured field quantities. Of special interest are the ellipticities of the magnetic field in the vertical and horizontal planes. These turn out to be very sensitive to the lateral variation of the conductivity structure. Other parameters, such as the vertical magnetic field on the surface, are much less influenced. It is suggested that the combination of such measurements should lead to an optimum system for source location in application to mine rescue operations.
KeywordsMagnetic Field Numerical Model Lateral Variation Special Interest Horizontal Plane
Unable to display preview. Download preview PDF.
- D. A. Hill andJ. R. Wait, (1973)The electromagnetic response of a buried sphere for buried-dipole excitation, Radio Science8 (8,9), 813–818.Google Scholar
- D. B. Large, L. Ball andA. J. Farstad (1973),Radio transmission to and from underground coal mines—Theory and measurement, IEEE Trans. on Comm.COM-21 (3), 194–202.Google Scholar
- B. D. Smith andS. H. Ward (1974),On the computation of polarization ellipse parameters, Geophysics39 (6), 867–869.Google Scholar
- C. H. Stoyer (1974),Numerical solutions of the response of a two-dimensional earth to an oscillating magnetic dipole source with application to a groundwater field study, Ph. D. thesis, The Pennsylvania State University.Google Scholar
- C. H. Stoyer andR. J. Greenfield (1975),Numerical solutions of the response of a two-dimensional earth to an oscillating magnetic dipole source, Paper accepted for publication in Geophysics.Google Scholar