Absolute marine gravimetry with matter-wave interferometry

Y. Bidel (), N. Zahzam, C. Blanchard, A. Bonnin, M. Cadoret, A. Bresson, D. Rouxel and M. F. Lequentrec-Lalancette
Additional contact information
Y. Bidel: ONERA – The French Aerospace Lab
N. Zahzam: ONERA – The French Aerospace Lab
C. Blanchard: ONERA – The French Aerospace Lab
A. Bonnin: ONERA – The French Aerospace Lab
M. Cadoret: ONERA – The French Aerospace Lab
A. Bresson: ONERA – The French Aerospace Lab
D. Rouxel: Shom – French hydrographic and oceanographic office
M. F. Lequentrec-Lalancette: Shom – French hydrographic and oceanographic office

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Measuring gravity from an aircraft or a ship is essential in geodesy, geophysics, mineral and hydrocarbon exploration, and navigation. Today, only relative sensors are available for onboard gravimetry. This is a major drawback because of the calibration and drift estimation procedures which lead to important operational constraints. Atom interferometry is a promising technology to obtain onboard absolute gravimeter. But, despite high performances obtained in static condition, no precise measurements were reported in dynamic. Here, we present absolute gravity measurements from a ship with a sensor based on atom interferometry. Despite rough sea conditions, we obtained precision below 10−5 m s−2. The atom gravimeter was also compared with a commercial spring gravimeter and showed better performances. This demonstration opens the way to the next generation of inertial sensors (accelerometer, gyroscope) based on atom interferometry which should provide high-precision absolute measurements from a moving platform.

Date: 2018
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DOI: 10.1038/s41467-018-03040-2

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