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The influence of the Earth's magnetic field on strapdown inertial gravimetry using Q-Flex accelerometers: static and dynamic experiments

Johann, Felix ; Becker, David ; Becker, Matthias ; Hoss, Matthias ; Löwer, Alexander ; Förste, Christoph (2024)
The influence of the Earth's magnetic field on strapdown inertial gravimetry using Q-Flex accelerometers: static and dynamic experiments.
In: Journal of Geodesy, 2021, 95 (9)
doi: 10.26083/tuprints-00023440
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: The influence of the Earth's magnetic field on strapdown inertial gravimetry using Q-Flex accelerometers: static and dynamic experiments
Language: English
Date: 18 March 2024
Place of Publication: Darmstadt
Year of primary publication: September 2021
Place of primary publication: Berlin ; Heidelberg
Publisher: Springer
Journal or Publication Title: Journal of Geodesy
Volume of the journal: 95
Issue Number: 9
Collation: 15 Seiten
DOI: 10.26083/tuprints-00023440
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

In recent strapdown airborne and shipborne gravimetry campaigns with servo accelerometers of the widely used Q-Flex type, results have been impaired by heading-dependent measurement errors. This paper shows that the effect is, in all likelihood, caused by the sensitivity of the Q-Flex type sensor to the Earth’s magnetic field. In order to assess the influence of magnetic fields on the utilised strapdown IMU of the type iMAR iNAV-RQH-1003, the IMU has been exposed to various magnetic fields of known directions and intensities in a 3-D Helmholtz coil. Based on the results, a calibration function for the vertical accelerometer is developed. At the example of five shipborne and airborne campaigns, it is outlined that under specific circumstances the precision of the gravimetry results can be strongly improved using the magnetic calibration approach: The non-adjusted RMSE at repeated lines decreased from 1.19 to 0.26 mGal at a shipborne campaign at Lake Müritz, Germany. To the knowledge of the authors, a significant influence of the Earth’s magnetic field on strapdown inertial gravimetry is demonstrated for the first time.

Uncontrolled Keywords: Gravimetry, Strapdown, Magnetic field, Q-Flex, IMU
Identification Number: Artikel-ID: 107
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-234400
Classification DDC: 500 Science and mathematics > 520 Astronomy, cartography
500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Geodesy > Physical and Satellite Geodesy
Date Deposited: 18 Mar 2024 13:42
Last Modified: 30 Apr 2024 09:32
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23440
PPN: 517364425
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