Determination of the accuracy and operating constants in a digitally biased ring core magnetometer
Physics of the Earth and Planetary Interiors
By: A.W. Green Jr.
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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.
| 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 |
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