Absolute airborne gravimetry with a cold atom sensor
By Y. Bidel, N. Zahzam, A. Bresson, C. Blanchard, M. Cadoret, A. Olesen, R. Forsberg. Journal of Geodesy, 2019
159 citations recorded by the source corpus.
Measuring gravity from an aircraft is essential in geodesy, geophysics and exploration. It fills a gap between satellite techniques which have a low spatial resolution and traditional ground measurements which can only be performed on ground in accessible areas. Today, only relative sensors are available for airborne gravimetry. This is a major drawback because of the calibration and drift estimation procedures which lead to important operational constraints and measurement errors. Here, we report an absolute airborne gravimeter based on atom interferometry. This instrument has been first tested on a motion simulator leading to gravity measurements noise of 0.3 mGal for 75 s filtering time constant. Then, we realized an airborne campaign across Iceland in April 2017. From repeated line and crossing points, we obtain gravity measurements with an estimated error between 1.7 and 3.9 mGal. The airborne measurements have also been compared to upward continued ground gravity data and show differences with a standard deviation ranging from 3.3 to 6.2 mGal and a mean value ranging from − 0.7 to − 1.9 mGal.
Subfields: Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/81eac2f35d0da6cf8feb5b971eeb1f72a1994966
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
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- Quantum test of the Universality of Free Fall using rubidium and potassium (2020, background): “er, and therefore all other components are suppressed by k{reversal. Using the sensitivity function formalism [62] we can calculate the frequency shifts ! Z( );i(t) ! clock;i B2 @B @z B(t) vrec;it; (10) with the clock shift ! clock;i. Computing the integral of the clock shift weighted with the sens”