Sensing of gradient electromagnetic fields from subsurface conducting targets

Author

Cress, Daniel H. ; Battel, L.C.

Author_Institution

Sandia Nat. Labs., Albuquerque, NM, USA

Volume

4

fYear

1996

fDate

27-31 May 1996

Firstpage

1935

Abstract

Electromagnetic techniques are presented for the problem of remotely locating buried conductors at depths on the order of 10 meters or more. The frequency ranges used vary from 5 kHz to 100 kHz. The subsurface is excited by bistatic or near-monostatic geometries. The sources for excitation include horizontal magnetic dipole (HMD), vertical magnetic dipole (VMD), and horizontal electric dipole (HED). Results emphasize the gradient receiver response of the field induced by the presence of the subsurface conductors. The gradient response is defined here to be the response of two opposing polarity (subtracting) magnetic dipole antennas displaced on the order of 5 meters from one another. Results are presented for a wire 10 meters beneath the surface

Keywords

electromagnetic induction; geophysical techniques; terrestrial electricity; 5 to 100 kHz; EM method; LF; VLF; bistatic method; buried conductor; buried object detection; geoelectric; geophysical measurement technique; gradient electromagnetic field; horizontal electric dipole; horizontal magnetic dipole; near-monostatic geometry; remote sensing; subsurface conducting target; terrestrial electricity; vertical magnetic dipole; Conductors; Dipole antennas; Electromagnetic fields; Frequency; Hardware; Instruments; Soil; Testing; Transmitters; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International

Conference_Location

Lincoln, NE

Print_ISBN

0-7803-3068-4

Type

conf

DOI

10.1109/IGARSS.1996.516847

Filename

516847