posted in Technology
World's first GPS-free quantum navigation trial succeeds at sea
interestingengineering.com/innovation/gravnav-10-times-more-accurate-quantum-sensors
Replying to @Gsus4@mander.xyz
“Quantum sensors can sense the tiniest of changes in the gravity or magnetic field and use a previously prepared map of these properties to determine their location. Since a quantum sensor does not need to receive or send a signal to an external device, it cannot be hacked or be spoofed by a fake incoming signal either. “ Very cool!
Replying to @hamsamrich@lemmy.world
Two issues I have with the presentation:
A magnetic field is an external signal - the Earth’s magnetic field is actually incredibly weak…
10x better performance than GNSS … positioning accuracy of 1 nautical mile. Cheap old school handheld GPS out in the woods was accurate better than 10 feet most of the time, so what in this performance is 10x better? 10x more resistant to jamming? Seems like it should be completely impervious to jamming. 1 nm accuracy is useful, but hardly better performance.
Replying to @MangoCats@feddit.it
For those confused:
nm means Nautical mile here, not nano meter