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2014 | OriginalPaper | Chapter

Preliminary Results from the Superconducting Gravimeter SG-060 Installed in West Africa (Djougou, Benin)

Authors : J. Hinderer, S. Rosat, M. Calvo, J.-P. Boy, B. Hector, U. Riccardi, L. Séguis

Published in: Earth on the Edge: Science for a Sustainable Planet

Publisher: Springer Berlin Heidelberg

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Abstract

A GWR superconducting gravimeter of the new generation (OSG-60) has been installed in July 2010 in sub-humid West Africa, at the Djougou station in Benin. This station is located in the AMMA-CATCH long term hydrological observing system. We present the first results in terms of instrumental drift as well as the calibration results using FG5 absolute gravity measurements. We show that geophysical contributions due to hydrological load can bias the initial drift estimate. The noise level is compared to the Strasbourg SG as well as to the reference New Low Noise Model (NLNM) used in seismology. We also investigate the gravity response to atmospheric pressure changes and show that, because of the presence of large thermal tides, the gravity response to mass changes in the atmosphere is more complex than in the simple case of a constant barometric admittance.

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previous chapter Reducing Non-tidal Aliasing Effects by Future Gravity Satellite Formations

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Title: Preliminary Results from the Superconducting Gravimeter SG-060 Installed in West Africa (Djougou, Benin)
Authors: J. Hinderer
S. Rosat
M. Calvo
J.-P. Boy
B. Hector
U. Riccardi
L. Séguis
Publisher: Springer Berlin Heidelberg
Book: Earth on the Edge: Science for a Sustainable Planet
Print ISBN: 978-3-642-37221-6

Electronic ISBN: 978-3-642-37222-3

Copyright Year: 2014
DOI: https://doi.org/10.1007/978-3-642-37222-3_55