Mobile gravimetric park – Gmob

The national park of mobile gravimeters (Gmob) is one of Résif‘s specific actions.

A sensor park at the service of the scientific community

GMob is the national park of mobile gravimeters made available to the scientific and academic community for the study of the gravity field. It is a set of complementary sensors (relative and absolute gravimeters) which measure the gravity field and its variations in space and time with an accuracy of 10-8 to 10-9 g in laboratories or in the field. These measurement tools were acquired over the last two decades and are today coordinated through the Résif specific action”Gravimetry”. Along with with the permanent gravimetric instruments from the RésifEquipex, Critex and Miga and complementary tools from other organizations, they are a part of a first-rate national gravimetric infrastructure (cf. Résif Newsletter, January 2018 – in French).

… in France and abroad, for a variety of research projects

The GMob instrument park is used both on French national territory and abroad for numerous research applications linked to the study of the solid Earth (structure, evolution, internal dynamics, telluric hazards, etc.) and its fluid envelopes (continental hydrology, oceanic loads, etc.), geodesy or metrology. These resources thus contribute to knowledge of the soil and subsoil, to the inventory or monitoring of resources (mining, oil, water), to monitoring and surveillance operations (monitoring of natural or industrial reservoirs and active tectonic or volcanic zones), to the establishment of national networks and gravimetric reference systems, or to knowledge of the geoid and altimetric reference systems. They are also used for education and training as gravimetry is one of the primary and most accessible approaches to geophysics for Earth or environmental sciences students.

Instruments

The equipment of the GMob park includes relative field gravimeters (Scintrex CG5 and CG6 gravimeters) and absolute gravimeters (FG5 and AQG) hosted by units at the Institut de Physique du Globe de Paris, Ecole et observatoire des sciences de la Terre, OSU Oreme and Observatoire Midi-Pyrénées.

Relative field gravity meters

  • Relative Spring Gravimeter – Scintrex CG5 (4)
  • Relative Spring Gravimeter – Scintrex CG6 (2)

Absolute gravimeters

  • Cube-corner absolute gravimeter – Micro-g LaCoste FG5 #206
  • Cube-corner absolute gravimeter – Micro-g LaCoste FG5 #228
  • Absolute Matter Wave Gravimeter – MuQuans AQG B01 (field instrument)
  • Absolute Matter Wave Gravimeter – MuQuans AQG A01 (laboratory instrument)

Members

OSU / UMR / University / Schools participating in GMob activities :

  • Université Paris-Diderot (IPGP, IGN)
  • Université Paris 6, Sisyphe
  • Observatoire de Paris (Syrte/LNE)
  • Université de Paris Sud (Géosciences)
  • Université de Toulouse / OMP (Get, Irap, Legos, Laas)
  • Université Montpellier / Oreme (GM)
  • Université de Strasbourg / Eost (IPGS)
  • Université de la Rochelle (LIENSs)
  • Université de Bretagne Occidentale / IUEM (LDO)
  • Université de Clermont-Ferrand / OPGC (LMV)
  • Université de Rennes / Osur (Géosciences Rennes)
  • Université de Grenoble / Osug (ISTerre)
  • Université Aix-Marseille / Pytheas (Cerege)
  • Université de Nice Sophia Antipolis / OCA (Geoazur)
  • Université d’Avignon / LHA
  • BRGM
  • IRD
  • SHOM
  • ESGT Le Mans

Industrial partner : Muquans

gmob.resif.fr

 

Domain : Gravimetry

Instrumentation : Mobile

Steering : Observatoire Midi-Pyrénées, Toulouse
Supervisor : Sylvain Bonvalot
Technical contact : Nicolas Le Moigne, Oreme Montpellier
Web contact :  Lucia Seoane

Members : See main text

 

Scintrex CG5 – CG6 relative gravimeters from GMob de Résif © Véronique Bertrand, Eost. To know more about it.

Muquans AQG Quantum Absolute Gravimeter at the Larzac observation site © Nicolas Le Moigne, Géosciences Montpellier. To know more about it.