Title :
Fields of horizontal currents located above the Earth
Author_Institution :
NBS, Boulder, CO, USA
fDate :
11/1/1988 12:00:00 AM
Abstract :
The plane-wave spectrum technique is used to derive the field of horizontal currents located in a horizontal plane above the Earth. The far field is derived asymptotically, and the near field is computed by a two-dimensional fast Fourier transform. Specific numerical results are presented for a pair of oppositely directed dipoles, and the results have application to detection of buried objects. When the antenna is located at low heights, the field is enhanced in the Earth and decreased in the air
Keywords :
geophysical prospecting; geophysical techniques; terrestrial electricity; EM method; antenna; buried objects; electric field; far field; geoelectric; horizontal currents; measurement; near field; oppositely directed dipoles; plane-wave spectrum technique; prospecting; scattering matrix; technique; two-dimensional fast Fourier transform; Buried object detection; Dipole antennas; Earth; Electromagnetic scattering; Fast Fourier transforms; Magnetic separation; Propagation losses; Reflection; Reflector antennas; Research and development;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
