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Polar Motion Effect on Gravity Observed with a Superconducting Gravimeter at Syowa Station, Antarctica

  • Tadahiro Sato
  • Kazunari Nawa
  • Kazuo Shibuya
  • Yoshiaki Tamura
  • Masatsugu Ooe
  • Katsutada Kaminuma
  • Yuichi Aoyama
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 117)

Abstract

Polar motion effect on gravity was analyzed using the 2 years data obtained with a superconducting gravimeter at Syowa Station, Antarctica. From the analysis, we obtained the amplitude factor (δ-factor) of 1.198±0.035 and a time lag about 20 days against to the gravity changes predicted from the IERS (International Earth Rotation Service) polar motion data. Our analysis using simulation data suggests that the results for least-squares fitting are affected by the accuracy of the correction for step-like changes in the observed gravity data.

Keywords

Polar Motion Gravity Change Superconducting Gravimeter Annual Component Annual Amplitude 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Tadahiro Sato
    • 1
  • Kazunari Nawa
    • 3
  • Kazuo Shibuya
    • 4
  • Yoshiaki Tamura
    • 2
  • Masatsugu Ooe
    • 2
  • Katsutada Kaminuma
    • 4
  • Yuichi Aoyama
    • 5
  1. 1.National Astronomical ObservatoryMizusawa-shi, 023Japan
  2. 2.National Astronomical ObservatoryJapan
  3. 3.School of ScienceNagoya UniversityJapan
  4. 4.National Institute Polar ResearchJapan
  5. 5.Faculty of ScienceKanazawa UniversityJapan

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