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Analysis of co-located measurements made with a LaCoste&Romberg Graviton-EG gravimeter and two superconducting gravimeters at Strasbourg (France) and Yebes (Spain)


Arnoso J1, Riccardi U2, Hinderer J.3 Córdoba B4, Montesinos F. G.5
1 Observatorio Geofísico Central, Instituto Geográfico Nacional, Madrid, Spain
2 Dipartimento di Scienze della Terra, dell'Ambiente e delle Risorse, Università degli Studi di Napoli Federico II, Largo San Marcellino 10, 80138 Napoli, Italy
3 IPG/EOST Strasbourg UMR 7516 (CNRS/Université de Strasbourg), 5 rue Descartes Strasbourg France
4 Instituto Geográfico Nacional, Observatorio de Yebes, Madrid, Spain
5 Facultad de Matemáticas, Universidad Complutense de Madrid, Madrid, Spain
Acta Geodaetica et Geophysica, Volume, 49, N. 2, Pagine 147-160, 2014
Doi: 10.1007/s40328-014-0043-y

ActaGeodeticaetGeophysica2014 RiccardiXVetrina DiSTARTwo experiments of intercomparison between the LaCoste&Romberg Graviton-EG1194 spring gravimeter and the superconducting gravimeters SG-026 andOSG-064, operating respectively at J9-Strasbourg (France) and CDT-Yebes (Spain), were analyzed. The main objective was to check the instrumental response of the spring meter, both in amplitude and phase as well as its time stability. A general conclusion is that normalization factors have been obtained with a similar ratio for main diurnal constituent O1 at both observing sites. The accuracy of scale factors was determined at the level of 0.03 % (at J9-Strasbourg) and 0.1 % (at CDT-Yebes). For the semidiurnal constituent M2, slight differences were found at J9-Strasbourg, which would require further investigations. Site effects were also demonstrated by considering the different response of the spring gravimeter to tilts and atmospheric pressure variations at both sites.
Key-words: Gravimetry, Spring gravimeter, Superconducting gravimeter