Studia Geophysica et Geodaetica

, Volume 59, Issue 1, pp 58–82

Comparison of the performances of different spring and superconducting gravimeters and STS-2 seismometer at the Gravimetric Observatory of Strasbourg, France

  • Severine Rosat
  • Marta Calvo
  • Jacques Hinderer
  • Umberto Riccardi
  • Jose Arnoso
  • Walter Zürn
Article

DOI: 10.1007/s11200-014-0830-5

Cite this article as:
Rosat, S., Calvo, M., Hinderer, J. et al. Stud Geophys Geod (2015) 59: 58. doi:10.1007/s11200-014-0830-5

Abstract

Since 1973, the Gravimetric Observatory of Strasbourg (France) is located in an old fort named J9 and has been the place for various gravity experiments. We present a comparison of the noise levels of various instruments that are or were continuously recording at J9, including the LaCoste&Romberg Earth-Tide Meter ET-5 (1973–1985), the GWR Superconducting Gravimeter TT-T005 (1987–1996), the Superconducting Gravimeter C026 (since 1996), the STS-2 seismometer (since 2010) and the LaCoste&Romberg ET-11 (continuously since October 2010). Besides these instruments, the J9 Observatory has hosted temporary gravity experiments with the Micro-g LaCoste Inc. gPhone-054 (May–December 2008 and May–September 2009) and the Micro-g LaCoste Inc. Graviton-EG1194 (June–October 2011). We include also in the comparison the absolute gravimeter Micro-g FG5 #206 which is regularly performing absolute gravity measurements at J9 since 1997 and a spring gravimeter Scintrex CG5 which recorded at J9 between March 2009 and February 2010. We present the performances of these various instruments in terms of noise levels using a standardized procedure based on the computation of the residual power spectral densities over a quiet time period. The different responses to atmospheric pressure changes of all the instruments are also investigated. A final part is devoted to the instrumental self-noise of the SG C026, STS-2 and L&R ET-11 using the three channel correlation analysis method applied to 1-Hz data.

Keywords

superconducting gravimeter spring gravimeter broad-band seismometer power spectral density noise level barometric admittance three-channel correlation 

Copyright information

© Institute of Geophysics of the ASCR, v.v.i 2014

Authors and Affiliations

  • Severine Rosat
    • 1
  • Marta Calvo
    • 1
    • 2
  • Jacques Hinderer
    • 1
  • Umberto Riccardi
    • 3
  • Jose Arnoso
    • 4
  • Walter Zürn
    • 5
  1. 1.Institut de Physique du Globe de Strasbourg, UMR 7516Université de Strasbourg/EOST, CNRSStrasbourg CedexFrance
  2. 2.Observatorio Geofísico CentralInstituto Geográfico Nacional (IGN)MadridSpain
  3. 3.Dipartimento di Scienze della Terra, dell’Ambiente e delle Risorse (DiSTAR)Università Federico II di NapoliNaplesItaly
  4. 4.Instituto de Geociencias (CSIC, UCM)MadridSpain
  5. 5.Black Forest Observatory of Karlsruhe Institute of Technology and University of StuttgartWolfachGermany

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