A simple method to retrieve the complex eigenfrequency of the Earth's nearly diurnal-free wobble; application to the Strasbourg superconducting gravimeter data - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Geophysical Journal International Année : 1994

A simple method to retrieve the complex eigenfrequency of the Earth's nearly diurnal-free wobble; application to the Strasbourg superconducting gravimeter data

Résumé

We have analysed more than four years of data from the Strasbourg superconducting gravimeter to retrieve the period and damping of the nearly diurnal-free wobble (NDFW). The removal of noise spikes is found to be crucial for an accurate determination of tidal-wave amplitudes and phases. A new simple algorithm is derived which allows an analytical solution for the NDFW pertod and damping using the complex gravimetric factors of three resonant diurnal waves. The results show a huge reduction of the confidence intervals when compared with a previous investigation from a Lacoste Romberg spring meter operated at the same station. Our results are in close agreement with values obtained from two other European superconducting gravimeters. The results are also compared with respect to values inferred from very long baseline interferometry (VLBI) measurements.
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Dates et versions

hal-00903340 , version 1 (11-03-2014)

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Nicolas Florsch, Fréderic Chambat, Jacques Hinderer, Hilaire Legros. A simple method to retrieve the complex eigenfrequency of the Earth's nearly diurnal-free wobble; application to the Strasbourg superconducting gravimeter data. Geophysical Journal International, 1994, 116 (1), pp.53-63. ⟨10.1111/j.1365-246X.1994.tb02127.x⟩. ⟨hal-00903340⟩
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