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Determination of the accuracy and operating constants in a digitally biased ring core magnetometer

Physics of the Earth and Planetary Interiors

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DOI: 10.1016/0031-9201(90)90217-L

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Abstract

By using a very stable voltage reference and a high precision digital-to-analog converter to set bias in digital increments, the inherently high stability and accuracy of a ring core magnetometer can be significantly enhanced. In this case it becomes possible to measure not only variations about the bias level, but to measure the entire value of the field along each magnetometer sensing axis in a nearly absolute sense. To accomplish this, one must accurately determine the value of the digital bias increment for each axis, the zero field offset value for each axis, the scale values, and the transfer coefficients (or nonorthogonality angles) for pairs of axes. This determination can be carried out very simply, using only the Earth's field, a proton magnetometer, and a tripod-mounted fixture which is capable of rotations about two axes that are mutually perpendicular to the Earth's magnetic field vector. ?? 1990.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Determination of the accuracy and operating constants in a digitally biased ring core magnetometer
Series title:
Physics of the Earth and Planetary Interiors
DOI:
10.1016/0031-9201(90)90217-L
Volume
59
Issue:
1-2
Year Published:
1990
Language:
English
Publisher:
Elsevier
Publisher location:
Amsterdam, Netherlands
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Physics of the Earth and Planetary Interiors
First page:
119
Last page:
122
Number of Pages:
4