Absolute airborne gravimetry with a cold atom sensor

Yannick Bidel*, Nassim Zahzam, Alexandre Bresson, Cédric Blanchard, Malo Cadoret, Arne V. Olesen, René Forsberg

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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.
Original languageEnglish
JournalJournal of Geodesy
Volume94
Issue number2
ISSN0949-7714
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • Gravimeter
  • Absolute
  • Airborne
  • Atom interferometry

Cite this

Bidel, Y., Zahzam, N., Bresson, A., Blanchard, C., Cadoret, M., Olesen, A. V., & Forsberg, R. (Accepted/In press). Absolute airborne gravimetry with a cold atom sensor. Journal of Geodesy, 94(2). https://doi.org/10.1007/s00190-020-01350-2
Bidel, Yannick ; Zahzam, Nassim ; Bresson, Alexandre ; Blanchard, Cédric ; Cadoret, Malo ; Olesen, Arne V. ; Forsberg, René. / Absolute airborne gravimetry with a cold atom sensor. In: Journal of Geodesy. 2020 ; Vol. 94, No. 2.
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abstract = "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.",
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Bidel, Y, Zahzam, N, Bresson, A, Blanchard, C, Cadoret, M, Olesen, AV & Forsberg, R 2020, 'Absolute airborne gravimetry with a cold atom sensor', Journal of Geodesy, vol. 94, no. 2. https://doi.org/10.1007/s00190-020-01350-2

Absolute airborne gravimetry with a cold atom sensor. / Bidel, Yannick; Zahzam, Nassim; Bresson, Alexandre; Blanchard, Cédric; Cadoret, Malo; Olesen, Arne V.; Forsberg, René.

In: Journal of Geodesy, Vol. 94, No. 2, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Absolute airborne gravimetry with a cold atom sensor

AU - Bidel, Yannick

AU - Zahzam, Nassim

AU - Bresson, Alexandre

AU - Blanchard, Cédric

AU - Cadoret, Malo

AU - Olesen, Arne V.

AU - Forsberg, René

PY - 2020

Y1 - 2020

N2 - 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.

AB - 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.

KW - Gravimeter

KW - Absolute

KW - Airborne

KW - Atom interferometry

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Bidel Y, Zahzam N, Bresson A, Blanchard C, Cadoret M, Olesen AV et al. Absolute airborne gravimetry with a cold atom sensor. Journal of Geodesy. 2020;94(2). https://doi.org/10.1007/s00190-020-01350-2