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  Theory and practice of moving mass (Newtonian) calibration of tilt and gravity meters

Benedek, J., Meurers, B., Leonhardt, R., Papp, G., Ruotsalainen, H. (2023): Theory and practice of moving mass (Newtonian) calibration of tilt and gravity meters, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4652

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021061 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021061_1
Genre: Conference Paper

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 Creators:
Benedek, Judit1, Author
Meurers, Bruno1, Author
Leonhardt, Roman1, Author
Papp, Gábor1, Author
Ruotsalainen, Hannu1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Probably the moving mass calibration (MMC) apparatus built in the underground Mátyáshegy Gravity and Geodynamics Laboratory Budapest has been used most extensively and several spring type instruments (LaCoste&Romberg and Scintrex gravimeters) have been investigated and calibrated by it. Its test mass is a cylindrical ring having a weight of 3 tons.The same principle and technology can be used to test compact tilt sensors having nanoradian resolution capability. Up to now rigorous testing methods below microradian range were not available in practice. The analysis of the so called off-axis variation of the gravitational vector generated by the vertical movement of the cylindrical ring mass of the Mátyáshegy MMC device, however, showed that a sufficiently accurate reference signal having (15±0.02) nrad peak-to-peak amplitude can be provided for calibration. It is just in the range of the tilt induced by earth tide effect, which is a “standard” signal component in the time series recorded in observatory environment. In the first part of the presentation a discussion of the proposed methodology of tilt meter calibration is given. Then results of the physical experiments dedicated to the support of the theory is shown. Special attention is payed for the investigation of some factors (mass heterogenities of the test mass, magnetic effects, etc...) influencing the accuracy of the calibration.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4652
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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