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CRYOVEX AND KAREN: Turns to look at gravity

26 Apr 2017, 13:49 UTC
CRYOVEX AND KAREN: Turns to look at gravity
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The recent international field campaign that took place in the Arctic to validate measurements from ESA’s CryoSat ice mission and to test the potential of using a new way of measuring ice in the future has been a huge logistical effort. While ice has been the focus, the campaign also offers a great opportunity to take other measurements and make sure the campaign benefits science as much as possible.
So, the Technical University of Denmark (DTU) and the French national aerospace research centre ONERA are taking advantage of the campaign to test a new gravimeter instrument that measures gravity.
ESA’s GOCE mission mapped variations in the Earth’s gravity field with extreme detail and accuracy, but airborne and maritime gravity surveys are still needed to achieve higher resolution measurements in some areas of interest.
It has been shown that atomic quantum sensors are a newly emerging technology that can be used for measuring the Earth’s gravity field. While on-board classical gravimeters typically suffer from drift, Cold Atom Interferometers are highly accurate over the entire frequency range.
DTU and ONERA are preparing a proof of concept mission to evaluate the performances of a new absolute gravimeter instrument relying on this technology.
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