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Absolute marine gravimetry with matter-wave interferometry.

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Atom interferometry enables precise absolute gravity measurements from moving platforms like ships. This technology overcomes limitations of current relative sensors, paving the way for advanced inertial sensors.

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Area of Science:

  • Geodesy and Geophysics
  • Quantum Sensing

Background:

  • Onboard gravimetry is crucial for geodesy, geophysics, resource exploration, and navigation.
  • Current relative gravimeters have significant operational constraints due to calibration and drift estimation.
  • Atom interferometry offers a promising path toward absolute gravimeters for dynamic platforms.

Purpose of the Study:

  • To demonstrate absolute gravity measurements from a ship using an atom interferometry sensor.
  • To assess the performance of atom interferometry in dynamic, rough sea conditions.
  • To compare the atom gravimeter's performance against a commercial spring gravimeter.

Main Methods:

  • Development and deployment of an absolute gravimeter based on atom interferometry on a moving ship.
  • Data collection under challenging, dynamic sea conditions.
  • Comparative analysis with a state-of-the-art commercial spring gravimeter.

Main Results:

  • Achieved precision below 10-5 m s-2 despite rough sea conditions.
  • The atom gravimeter outperformed the commercial spring gravimeter.
  • Successfully demonstrated precise absolute gravity measurements from a dynamic platform.

Conclusions:

  • Atom interferometry is a viable technology for high-precision onboard absolute gravimetry.
  • This technology overcomes the limitations of current relative gravimeters in dynamic environments.
  • Paves the way for next-generation absolute inertial sensors (accelerometers, gyroscopes) for moving platforms.