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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/gi-2019-14
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2019-14
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

  08 May 2019

08 May 2019

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This preprint was under review for the journal GI but the revision was not accepted.

Method for testing the calibration of acceleration and pressure gauges installed at the ocean bottom

Mikhail Nosov1,2, Viacheslav Karpov1,2, Sergey Kolesov1,2, Kirill Sementsov1, Hiroyuki Matsumoto3, and Yoshiyuki Kaneda4 Mikhail Nosov et al.
  • 1Chair of Physics of Sea and Inland Water, Faculty of Physics, M.V.Lomonosov Moscow State University, 119991, LeninskieGory, Moscow, Russia
  • 2Institute of Marine Geology and Geophysics, Far Eastern Branch of Russian Academy of Science, 693022, Nauki 1B,Yuzhno-Sakhalinsk, Russia
  • 3Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 237-0061, 2-15 Natsushima, Yokosuka, Japan
  • 4Institute of Education, Research and Regional Cooperation for Crisis Management, Kagawa University, 760-8521, 1-1Saiwai-cho, Takamatsu, Japan

Abstract. A method is proposed for testing pressure gauges and z-accelerometers, installed in ocean-bottom observatories. The method is based on the linear relationship between variations of the ocean-bottom pressure and the z-acceleration, observed during seismic movements of the bottom within the frequency band of "forced oscillations". Calculation of the boundaries of this frequency band is based on the ocean depth at the observatory site making use of explicit formulae. In the case of correct calibration of the gauges calculation of the ratios of power spectra of bottom pressure variations and the z-accleration within the band of "forced oscillations" yields constant values equal to the square ratio of the total mean pressure and the gravity acceleration. The conditions for application of the proposed method are formulated.

Mikhail Nosov et al.

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Mikhail Nosov et al.

Mikhail Nosov et al.

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Latest update: 17 Sep 2020
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Short summary
Nowadays ocean-bottom observatories, equipped with acceleration and pressure gauges (seismometers and tsunameters), became widespread. We suggest simple and reliable method for remote testing the calibration of the gauges installed at the ocean bottom. The method is extremely convenient for practice, since, besides measured quantities, it involves a sole physical constant – the gravity acceleration.
Nowadays ocean-bottom observatories, equipped with acceleration and pressure gauges...
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