GID Geoscientific Instrumentation, Methods and Data Systems Discussions GID Geosci. Instrum. Method. Data Syst. Discuss. 2193-0872 Göttingen, Germany 10.5194/gi-2019-14 Method for testing the calibration of acceleration and pressure gauges installed at the ocean bottom Nosov Mikhail 1 2 Karpov Viacheslav https://orcid.org/0000-0002-3878-6622 1 2 Kolesov Sergey 1 2 Sementsov Kirill https://orcid.org/0000-0001-8495-1281 1 Matsumoto Hiroyuki https://orcid.org/0000-0002-6845-5947 3 Kaneda Yoshiyuki https://orcid.org/0000-0001-9865-5846 4 Chair of Physics of Sea and Inland Water, Faculty of Physics, M.V.Lomonosov Moscow State University, 119991, LeninskieGory, Moscow, Russia Institute of Marine Geology and Geophysics, Far Eastern Branch of Russian Academy of Science, 693022, Nauki 1B,Yuzhno-Sakhalinsk, Russia Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 237-0061, 2-15 Natsushima, Yokosuka, Japan Institute of Education, Research and Regional Cooperation for Crisis Management, Kagawa University, 760-8521, 1-1Saiwai-cho, Takamatsu, Japan Russian Foundation for Basic Research 19-05-00351 08 05 2019 2019 1 11 Copyright: © 2019 Mikhail Nosov et al. 2019 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://gi.copernicus.org/preprints/gi-2019-14/ The full text article is available as a PDF file from https://gi.copernicus.org/preprints/gi-2019-14/gi-2019-14.pdf

<p>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.</p>