Articles | Volume 7, issue 1
https://doi.org/10.5194/gi-7-1-2018
https://doi.org/10.5194/gi-7-1-2018
Research article
 | 
23 Jan 2018
Research article |  | 23 Jan 2018

Numerical evaluation of magnetic absolute measurements with arbitrarily distributed DI-fluxgate theodolite orientations

Heinz-Peter Brunke and Jürgen Matzka

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Cited articles

Brunke, H.-P.: AlternateMagAbsolutes – A software package for Magnetic Absolute Measurements with arbitrarily distributed DI Theodolite Orientations V.1.0, GFZ Data Services, https://doi.org/10.5880/GFZ.2.3.2017.003, 2017. a, b
Crosthwaite, P.: Declination-Inclination Magnetometer: Theory and Practice, Australien Geological Survey Organisation (Geomagnetism Section) Geomagnetism Note 1994-11), 1994. a, b
Jankowski, J. and Sucksdorff, C.: IAGA Guide for Magnetic Measurements and Observatory Practice, IAGA, http://www.iaga-aiga.org/data/uploads/pdf/guides/iaga-guide-observatories.pdf, 1996. a, b
Kerridge, D.: The theory of the fluxgate theodolite, British Geological Survey Geomagnetic Research Group Report No. 88/14, 1988. a
KringLauridsen: Experiences with the DI-Fluxgate Magnetometer inclusive Theory of the Instrument and Comparison to other Methods, Danish Meteorological Institute, Geophysical Papers, 1985. a, b
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Short summary
The long-term drift of magnetometers at geomagnetic observatories is calibrated by a non-magnetic theodolite. We propose a numerical method to evaluate such absolute measurements in a new, more general manner. It is more flexible and helps to identify and correct or discard erroneous measurements. We derive this method and give examples showing how it improves the quality and reliability of the calibrations parameters (the so-called baseline values) of an observatory magnetometer.