Comparison of the performances of different spring and superconducting gravimeters and STS-2 seismometer at the Gravimetric Observatory of Strasbourg, France - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Studia Geophysica et Geodaetica Année : 2014

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

Séverine Rosat
Umberto Riccardi
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W. Zürn
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  • PersonId : 901379

Résumé

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.
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hal-01228685 , version 1 (13-11-2015)

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Séverine Rosat, Marta Calvo Garcia-Maroto, Jacques Hinderer, Umberto Riccardi, Arnoso Jose, et al.. Comparison of the performances of different spring and superconducting gravimeters and STS-2 seismometer at the Gravimetric Observatory of Strasbourg, France. Studia Geophysica et Geodaetica, 2014, ⟨10.1007/s11200-014-0830-5⟩. ⟨hal-01228685⟩
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