A Null-Field Method for Estimating Underground Position

Author

Davis, Clayton P. ; Chew, Weng Cho ; Tucker, W.W. ; Atkins, P.R.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL

Volume

46

Issue

11

fYear

2008

Firstpage

3731

Lastpage

3738

Abstract

The geometric characteristics of low-frequency magnetic dipole fields and their relative insensitivity to the host media have made low-frequency coils useful for underground geolocation. A robust and succinct method is presented for converting dipole field measurements into estimates of receiver position. A noisy half-space model of the Earth is used to model the receiving environment. A perfectly conducting sphere immersed in a homogeneous conducting background is used to study the localized effects of buried metals.

Keywords

geomagnetism; loop antennas; position measurement; terrestrial electricity; buried metals effect; cave radio signals; dipole field measurements; geometric characteristics; low-frequency coils; magnetic dipole fields; noisy half-space model; null-field method; receiver position estimation; underground position estimation; Antenna measurements; Coils; Electromagnetic measurements; Frequency; Low-frequency noise; Magnetic field measurement; Position measurement; Robustness; Transmitters; Working environment noise; Half-space; loop antennas; magnetic dipoles;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2008.2000878

Filename

4686010