We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Long‐Term Stability of Tilt‐Controlled gPhoneX Gravimeters.
- Authors
Fores, Benjamin; Klein, Gilbert; Le Moigne, Nicolas; Francis, Olivier
- 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. Key Points: gPhoneXs are suitable for long‐term gravity monitoring when the tilts are actively controlled
- Subjects
GRAVIMETERS (Geophysical instruments); GEODYNAMICS; GEODESY; OBSERVATORIES; GLACIAL drift
- Publication
Journal of Geophysical Research. Solid Earth, 2019, Vol 124, Issue 11, p12264
- ISSN
2169-9313
- Publication type
Article
- DOI
10.1029/2019JB018276