Noise Removal Using Multi-Channel Coherence

Abstract

In this report we show how magnetic noise occurring on an ocean floor magnetometer can be reduced using a collocated pressure sensor and a separate more distant magnetometer. To achieve this, a multi-channel coherence technique is applied to the measurement data. The removal of magnetic noise on ocean floor magnetometers has several applications, including mine warfare systems and ocean surveillance systems. Decreasing the background magnetic noise by 10-20 dB will allow the detection of a vessel magnetic field with amplitude the same order of magnitude as the background field, and with frequency content similar to that of the background field.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2010
Accession Number
ADA555503

Entities

People

  • C. E. Lucas
  • R. Otnes

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Amplitude
  • Background Noise
  • Detection
  • Detectors
  • Frequency
  • Frequency Bands
  • Magnetic Detectors
  • Magnetic Signatures
  • Magnetometers
  • Measurement
  • Pressure Signatures
  • Seabed
  • Security
  • Surveillance
  • Target Detection
  • Target Signatures
  • Transfer Functions

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Military/Explosive Ordnance Disposal (EOD) Technology
  • Radio communications and signal processing.