Reference : Long-term stability of tilt-controlled gPhoneX gravimeters
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/10993/40899
Long-term stability of tilt-controlled gPhoneX gravimeters
English
Fores, Benjamin [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit]
Klein, Gilbert [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit]
Le Moigne, Nicolas [> >]
Francis, Olivier mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit]
2019
Journal of Geophysical Research: Solid Earth
n/a
n/a
Yes
[en] Gravity Monitoring ; Spring gravimeters ; Long-term gravity changes
[en] 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.
http://hdl.handle.net/10993/40899
10.1029/2019JB018276
https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JB018276

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Limited access
16615850.pdfAuthor postprint2.76 MBRequest a copy

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.