Methods and apparatus for automatic magnetic compensation

Details Methods and apparatus for automatic magnetic compensation Methods and apparatus for automatic magnetic compensation

2005-03-01

2005-03-01

Bennett, G. Bradley (Department: 2859)

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

C033S351000, C324S244000, C701S207000

Reexamination Certificate

active

06860023

ABSTRACT:
A method for characterizing distortions in the earth's magnetic field caused by a vehicle having a magnetometer affixed therein is described. The method includes repeatedly measuring the distorted magnetic field utilizing the magnetometer and obtaining a three-dimensional orientation of the vehicle axes with respect to the earth at a time of each magnetometer measurement. The method also includes receiving undistorted earth magnetic field data for the vicinity of the vehicle relative to the earth at the time of each magnetometer measurement and characterizing distortions caused by one or more of the vehicle and magnetometer errors utilizing the magnetic field measurements, the orientations of the vehicle, and the undistorted earth magnetic field data.

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International Search Report dated Dec. 22, 2003, Application No. PCT/US03/41817, 7 pages.

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