Long‐Term Stability of Tilt‐Controlled gPhoneX Gravimeters

Benjamin Fores 1 Gilbert Klein 1 Nicolas Le Moigne 2 Olivier Francis 1
1 Uni.lu - Université du Luxembourg
2 Géosciences Montpellier
Abstract : Spring relative gravimeters are considered too unstable to provide useful information on long‐term gravity variations. In this paper, we prove that the new generation of spring gravimeter gPhoneX can reach long‐term stability at the μGal level (10 nm s−2) when the verticality of the gravimeter is maintained, if the instrumental drift can be correctly estimated. We conducted two comparisons with different gPhoneXs in different observatories and environmental conditions. In the “Walferdange Underground Laboratory for Geodynamics” in Luxembourg, we compared time series from the gPhoneX (with and without tilt control), with data from a superconducting gravimeter. We found an agreement at the μGal level when the tilt control is switched on. We validated this result by repeating the experiment at the “Geodesy in Karstic Environment” observatory in the south of France. The fit between the superconducting gravimeter and the gPhoneX hourly values gives similar results at all frequencies over 276 days of measurements. The linear correlation coefficient between the gPhoneX and superconducting gravimeter reaches 0.99, with a misfit of 6.0 nm s−2. We demonstrated that tilt‐controlled gPhoneXs are suitable for long‐term gravity monitoring.
Keywords : Gravity Monitoring Spring gravimeters Long‐term gravity changes
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [31 références]  Voir  Masquer  Télécharger
https://hal.umontpellier.fr/hal-02445479
Contributeur : Gm Aigle <>
Soumis le : lundi 20 janvier 2020 - 11:23:46
Dernière modification le : mardi 21 janvier 2020 - 01:56:11

Fichier

 Accès restreint
Fichier visible le : 2020-05-08

Connectez-vous pour demander l'accès au fichier

Identifiants

Collections

UNIV-MONTPELLIER | UNIV-AG | INSU | B3ESTE | GM | CNRS

Citation

Benjamin Fores, Gilbert Klein, Nicolas Le Moigne, Olivier Francis. Long‐Term Stability of Tilt‐Controlled gPhoneX Gravimeters. Journal of Geophysical Research : Solid Earth, American Geophysical Union, 2019, 124 (11), pp.12264-12276. ⟨10.1029/2019JB018276⟩. ⟨hal-02445479⟩

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

82