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
Why do we expect this quantum map of gravity and magnetic fields to be permanent?
Replying to @Knock_Knock_Lemmy_In@lemmy.world
Why do you think they expect it to be permanent? We survey all kinds of stuff like this all the time.
Replying to @frongt@lemmy.zip
Geography and celestial maps are permanent (mostly).
The next question is, how long until a quantum measured map becomes unrecognised? Is the half life years or hours?
Replying to @Knock_Knock_Lemmy_In@lemmy.world
There’s literally whole projects to map out movements of continents and the change of the geoid shape of earth, although it takes a few years for it to matter in most cases
Replying to @Natanael@infosec.pub
Unless there is volcanic activity, geography can be considered permanent within a lifetime. Given the accuracy this technology claims, I suspect the lifespan is very short lived.
Replying to @Knock_Knock_Lemmy_In@lemmy.world
djublonskopf.com/…/how-do-we-know-the-continents-…
Multiple centimeters per year isn’t nothing but it is enough to force recalibration within your lifetime, multiple times
You don’t use those kinds of sensors non-stop from one calibration. You recalibrate and update maps regularly. Then if you lose some sensors you can still read reckon with high enough precision for weeks