Quantum Gravity Sensor Enables GPS-Free Navigation

Q-CTRL, an Australian company, has developed a novel quantum gravity sensor that measures gravity changes by detecting variations in the travel time of falling atoms. Tested aboard a Royal Australian Navy vessel, the sensor successfully enabled 144 hours of GPS-free navigation. This technology overcomes the cumulative error problem of traditional inertial navigation systems and is jam-resistant and spoof-proof, offering a robust alternative for GPS-reliant sectors like maritime and transportation, especially in polar regions or areas with GPS interference. While currently large, future miniaturization promises broader applications.