Q-CTRL's Ironstone Opal GPS-like positioning: passive, undetectable, cannot be jammed/ spoofed, 50X better than conventional GPS alternatives

 https://insidegnss.com/q-ctrl-overcomes-gps-denial-with-quantum-sensing/

"quantum sensor detects tiny, otherwise imperceptible signals arising from Earth’s structure serving as magnetic landmarks for navigation... sensitivity/ stability needed to continuously see these landmarks from moving vehicle... AI software shields delicate quantum sensors against interference, device miniaturized by trading hardware for software... aerospace, defense, autonomous vehicles"

Related:

New quantum navigation device uses atoms to measure acceleration in 3D
https://www.colorado.edu/today/2025/06/11/new-quantum-navigation-device-uses-atoms-measure-acceleration-3d

Next-gen GNSS delivers real-time positioning with centimeter accuracy
https://www.eurekalert.org/news-releases/1090255

A Quantum Gravimeter for GPS Backup An Australian ship navigated using it for six days 
https://spectrum.ieee.org/quantum-gravity-sensor

New algorithm brings real-time precision to navigation systems
https://www.eurekalert.org/news-releases/1095465

GPS timekeeping is increasingly vulnerable: here’s how to deliver future-proofed time
https://www.nature.com/articles/d41586-025-02921-z

GPS slowing created by tall skyscrapers in big cities overcome
https://www.eurekalert.org/news-releases/1101120