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Journal of Geodesy

, Volume 88, Issue 6, pp 617–622 | Cite as

High tilt susceptibility of the Scintrex CG-5 relative gravimeters

  • R. Reudink
  • R. KleesEmail author
  • O. Francis
  • J. Kusche
  • R. Schlesinger
  • A. Shabanloui
  • N. Sneeuw
  • L. Timmen
Short Note

Abstract

We report on the susceptibility of the Scintrex CG-5 relative gravimeters to tilting, that is the tendency of the instrument of providing incorrect readings after being tilted (even by small angles) for a moderate period of time. Tilting of the instrument can occur when in transit between sites usually on the backseat of a car even using the specially designed transport case. Based on a series of experiments with different instruments, we demonstrate that the readings may be offset by tens of \(\upmu \)Gal. In addition, it may take hours before the first reliable readings can be taken, with the actual time depending on how long the instrument had been tilted. This sensitivity to tilt in combination with the long time required for the instrument to provide reliable readings has not yet been reported in the literature and is not addressed adequately in the Scintrex CG-5 user manual. In particular, the inadequate instrument state cannot easily be detected by checking the readings during the observation or by reviewing the final data before leaving a site, precautions suggested by Scintrex Ltd. In regional surveys with car transportation over periods of tens of minutes to hours, the gravity measurements can be degraded by some 10 \(\upmu \)Gal. To obtain high-quality results in line with the CG-5 specifications, the gravimeters must remain in upright position to within a few degrees during transits. This requirement may often be unrealistic during field observations, particularly when observing in hilly terrain or when walking with the instrument in a backpack.

Keywords

Scintrex CG-5 autograv Hysteresis Tilt Susceptibility to tilt Accuracy degradation 

Notes

Acknowledgments

We want to thank two anonymous reviewers, the editor, Chris Jekeli, and Tonie van Dam, for providing valuable comments which helped us to improve the manuscript.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • R. Reudink
    • 1
  • R. Klees
    • 1
    Email author
  • O. Francis
    • 2
  • J. Kusche
    • 3
  • R. Schlesinger
    • 4
  • A. Shabanloui
    • 3
  • N. Sneeuw
    • 4
  • L. Timmen
    • 5
  1. 1.Delft University of TechnologyDelftThe Netherlands
  2. 2.University of LuxembourgLuxembourgGermany
  3. 3.University of BonnBonnGermany
  4. 4.University of StuttgartStuttgartGermany
  5. 5.Leibniz University HannoverHannoverGermany

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