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No.3(pp.69-95)

Home > Issues > Volume 9 (2004) > No.3(pp.69-95)

Noise Reduction of Geomagnetic Signals From Randomly Oriented Sensors

Journal of Magnetics, Volume 9, Number 3, 30 Sep 2004, Pages 69-74

Yong J. Song*

(Department of Physics, Ajou University), Choong S. Lee(Department of Physics, Ajou University), Ki C. Kim(Electronics and Telecommunications Research Institute), Sun-Ho Lim(LG Innotek Co., Ltd), Duk-Yung Kim(LG Innotek Co., Ltd), Dong-Hwan Son(Naval Weapon System R&D Center), Dae Y Kim(Naval Weapon System R&D Center)

Abstract

A method of processing signals of unaligned geomagnetic sensors placed on the seabed is presented. The offset drifts of the fluxgate sensors are processed by polynomial fitting and the orientations of the sensor axes are found by minimizing the noise power using wavelet analysis. The noise power was reduced by 9.1 dB by processing the components of magnetic field separately using subtraction filter, polynomial fitting and wavelet analysis.

Keywords: geomagnetic signal; noise reduction; subtraction filter; fluxgate sensor

DOI:

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