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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/gi-2020-10
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2020-10
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  25 May 2020

25 May 2020

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A revised version of this preprint was accepted for the journal GI and is expected to appear here in due course.

Principal Component Gradiometer technique for removal of spacecraft-generated disturbances from magnetic field data

Ovidiu Dragoş Constantinescu1,2, Hans-Ulrich Auster1, Magda Delva3, Olaf Hillenmaier4, Werner Magnes3, and Ferdinand Plaschke3 Ovidiu Dragoş Constantinescu et al.
  • 1Institute for Geophysics and Extraterrestrial Physics, TU Braunschweig, Germany
  • 2Institute for Space Sciences, Bucharest, Romania
  • 3Space Research Institute, Austrian Academy of Sciences, Graz, Austria
  • 4Magson GmbH, Berlin, Germany

Abstract. In situ measurement of the magnetic field using space borne instruments requires either a magnetically clean platform and/or a very long boom for accommodating magnetometer sensors at a large distance from the spacecraft body. This significantly drives up the costs and time required to build a spacecraft. Here we present an alternative sensor configuration and an algorithm allowing for ulterior removal of the spacecraft generated disturbances from the magnetic field measurements, thus lessening the need for a magnetic cleanliness program and allowing for shorter boom length. The proposed algorithm is applied to the Service Oriented Spacecraft Magnetometer (SOSMAG) onboard the Korean geostationary satellite GeoKompsat-2A (GK2A) which uses for the first time a multi-sensor configuration for onboard data cleaning. The successful elimination of disturbances originating from several sources validates the proposed cleaning technique.

Ovidiu Dragoş Constantinescu et al.

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Status: closed
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Ovidiu Dragoş Constantinescu et al.

Ovidiu Dragoş Constantinescu et al.

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Latest update: 02 Dec 2020
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Short summary
We propose a gradiometer based technique to clean multi-sensor magnetic field data acquired onboard spacecraft. The technique takes advantage on the fact that the maximum variance direction of many AC disturbances onboard spacecraft does not change in time. We apply the proposed technique to the SOSMAG instrument onboard GeoKompsat-2A. We analyse the performance and limitations of the technique and discuss in detail how various disturbances are removed.
We propose a gradiometer based technique to clean multi-sensor magnetic field data acquired...
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