Transient electromagnetic field of a vertical magnetic dipole above a plane non-perfectly conducting earth

Author

Kooij, B.J.

Author_Institution

Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands

fYear

1991

fDate

24-28 June 1991

Firstpage

622

Abstract

The transient electromagnetic field generated by a vertical magnetic dipole above a conducting earth is investigated theoretically. The exact time-domain response of a vertical magnetic dipole above a conducting half-space is of crucial importance in the interpretation of airborne electromagnetic data. With the aid of airborne electromagnetic systems, conductivity maps of the Earth surface are produced which can be related to surficial geology. By representing the reflection factor of the reflected field as a Laplace integral, it is shown that it is possible to arrive at a representation for the field in the transform domain that allows the application of the Cagniard-de Hoop method. Numerical results are presented.<>

Keywords

electromagnetic field theory; magnetic moments; transients; Cagniard-de Hoop method; Earth surface; Laplace integral; airborne electromagnetic data; airborne electromagnetic systems; conducting earth; conducting half-space; conductivity maps; geology; reflected field; reflection factor; time-domain response; transform domain; transient EM field; transient electromagnetic field; vertical magnetic dipole; Earth; Electromagnetic fields; Electromagnetic reflection; Electromagnetic transients; Fourier transforms; Geology; Laboratories; Magnetic domains; Magnetic fields; Tiles;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1991. AP-S. Digest

Conference_Location

London, Ontario, Canada

Print_ISBN

0-7803-0144-7

Type

conf

DOI

10.1109/APS.1991.174916

Filename

174916