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Dynamic magnetic anomaly compensation

  • US 20050099177A1
  • Filed: 11/05/2004
  • Published: 05/12/2005
  • Est. Priority Date: 11/06/2003
  • Status: Active Grant
First Claim
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1. A system for dynamically compensating for magnetic anomalies due to the proximity of ferromagnetic objects or electric motors, comprising:

  • a parallelopiped;

    three-axis magnetometers located at selected corners of said parallelopiped, said magnetometers having their three orthogonal axes aligned with the three orthogonal axes of the other magnetometers; and

    , a processor coupled to the outputs of said magnetometers to derive the magnetic anomaly gradient vector, whereby said magnetic anomaly gradient vector may be used to compensate for heading errors from instruments for which heading is an output.

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