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Combined Use of a Superconducting Gravimeter and Scintrex Gravimeters for Hydrological Correction of Precise Gravity Measurements: A Superhybrid Gravimetry

  • Yuichi ImanishiEmail author
  • Kazunari Nawa
  • Yoshiaki Tamura
  • Hiroshi Ikeda
  • Ryo Honda
  • Takashi Okuda
  • Makoto Okubo
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 149)

Abstract

A variant of hybrid gravimetry using both a superconducting gravimeter and Scintrex gravimeters is proposed. One of the main factors limiting the accuracy of time lapse gravity measurements is the instrumental drift of spring-type gravimeters. Running the Scintrex CG-5 gravimeter in the nighttime on the same pier as the superconducting gravimeter allows us to model the long-term behavior of the former and to remove efficiently the effect of irregular drift on measured gravity. Initial tests performed at Ishigakijima, Japan, proved that accuracy of a few μGal level can be achieved with this method. This will help us precisely correct for the effect of underground water on superconducting gravimeters with 2-dimensional local gravity survey.

Keywords

Hybrid gravimetry Scintrex gravimeter Superconducting gravimeter 

Abbreviation

SG

Superconducting gravimeter

Notes

Acknowledgements

We thank the VERA Project of National Astronomical Observatory of Japan for supporting our superconducting gravimeter observations at the VERA Ishigakijima station. Comments by two anonymous reviewers were helpful for improving the paper. This work was financially supported by JSPS KAKENHI Grant Numbers JP23340125, JP26289350 and JP26610139, and by the Cooperative Research Program of Earthquake Research Institute, The University of Tokyo.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Yuichi Imanishi
    • 1
    Email author
  • Kazunari Nawa
    • 2
  • Yoshiaki Tamura
    • 3
  • Hiroshi Ikeda
    • 4
  • Ryo Honda
    • 5
  • Takashi Okuda
    • 6
  • Makoto Okubo
    • 7
  1. 1.Earthquake Research Institute, The University of TokyoBunkyoJapan
  2. 2.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 7TsukubaJapan
  3. 3.Mizusawa VLBI Observatory, National Astronomical Observatory of JapanOshuJapan
  4. 4.Research Facility Center for Science and TechnologyUniversity of TsukubaTsukubaJapan
  5. 5.Mount Fuji Research Institute, Yamanashi Prefectural GovernmentFujiyoshidaJapan
  6. 6.Earthquake and Volcano Research Center, Graduate School of Environmental StudiesNagoya UniversityNagoyaJapan
  7. 7.Natural Science Cluster, Kochi UniversityKochiJapan

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