Released
Dataset

Superconducting Gravimeter Data from LNE-SYRTE Trappes - Level 1

Cite as:

Merlet, Sébastien; Pereira dos Santos, Franck (2020): Superconducting Gravimeter Data from LNE-SYRTE Trappes - Level 1. GFZ Data Services. https://doi.org/10.5880/igets.tr.l1.001

Status

I   N       R   E   V   I   E   W : Merlet, Sébastien; Pereira dos Santos, Franck (2020): Superconducting Gravimeter Data from LNE-SYRTE Trappes - Level 1. GFZ Data Services. https://doi.org/10.5880/igets.tr.l1.001

Abstract

The International Geodynamics and Earth Tide Service (IGETS) was established in 2015 by the International Association of Geodesy. IGETS continues the activities of the Global Geodynamics Project (GGP) between 1997 and 2015 to provide support to geodetic and geophysical research activities using superconducting gravimeter (SG) data within the context of an international network. As part of this network, the Trappes station (code TR) was established in 2013 by LNE-SYRTE. Continuous time-varying gravity and atmospheric pressure data from TR are integrated in the IGETS data base hosted by ISDC (Information System and Data Centre) at GFZ.

LNE-SYRTE is responsible for primary metrology missions of gravimetry in France. The gravimetry laboratory is located at 30 km at the West of Paris (longitude: 1.98 E, latitude: 48.76 N, height above MSL: 170 m) [Merlet et al. 2008, doi:10.1088/0026-1394/45/3/002] in the French National Metrology Institute LNE-Trappes. It has been designed to accommodate other gravimeters for metrological comparisons tests and calibrations and is located close to the LNE Kibble Balance for which an absolute value of g is needed [Thomas et al. doi.org/10.1088/1681-7575/aa7882]. For that purpose an absolute quantum gravimeter has been developed [Louchet-Chauvet et al. 2011, doi:10.1088/1367-2630/13/6/065025, Karcher et al. 2018, doi.org/10.1088/1367-2630/aaf07d]. To evaluate its long term sensitivity, to ensure redundancy and to guarantee the continuity of the gravity signal in case of displacement of the reference gravimeter, an SG manufactured by GWR Instruments, the iGrav#005, has been installed in the gravimetry laboratory at the beginning of 2013. With the quantum gravimeter, it allows for Planck constant determination and now for the implementation of the new definition of the kilogram [Thomas et al. doi.org/10.1088/1681-7575/aa7882]. Research activities are aimed at both improving the accuracy of the quantum instrument, of 20 nm.s-2 currently, to a level below 10 nm.s-2, and its long term sensitivity, of 0.6 nm.s-2 currently, to a level below 0.1 nm.s-2.

The time series of gravity and barometric pressure from the gravimeter iGrav-005 starts in February 2013. It interrupted 3 times: from 25 of may 2018 to 4 of July 2018 due to a coldhead maintenance problem of the manufacturer; from 14 of August 2019 to 1st of October 2019 and from 1st of January 2020 to 4th of March 2020 for a CPU problem. The time sampling of the raw gravity and barometric pressure data of IGETS Level 1 is both 1 minute and 1 second. For a detailed description of the IGETS data base and the provided files see Voigt et al. (2016, http://doi.org/10.2312/GFZ.b103-16087).

Moreover the laboratory is also equipped with a permanent GNSS (Global Navigation Satellite Systems) antenna LNE1 belonging of the RENAG network (RESIF-RENAG French National Geodetic Network, RESIF – Réseau Sismologique et Géodésique Français, https://doi.org/10.15778/resif.rg, 2017) which is the French contribution to EPOS for the Seismology and Geodesy components.

Authors

Contact

  • Merlet, Sébastien (Researcher) ; LNE-SYRTE, Observatoire de Paris - Université PSL, CNRS, Sorbonne Université;

Contributors

Voigt, Christian

Keywords

Metrology, Geophysics, Geodesy, Superconducting gravimetry, Earth tides, IGETS International Geodynamics and Earth Tide Service,

GCMD Science Keywords

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      • publisher: GFZ Data Services
      • publicationYear: 2020
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        • subject: Geophysics
        • subject: Geodesy
        • subject: Superconducting gravimetry
        • subject: Earth tides
        • subject: IGETS International Geodynamics and Earth Tide Service
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