Thanks for the ping. Looks like a three-way Nobel Prize in Physics is in their future.
· List topics · post a topic · subscribe · Google ·
Posted on 08/19/2024 5:17:06 AM PDT by Red Badger
Not much bothers the Quantum World.............
Besides that, the photo is staged. I’ve been in such situations where there is a staged photo for the papers, where everybody looks like they are doing something.......😁
Well that will make jamming of cruise missiles next to impossible.
I’m old enough to know navigation using one of the fundamental forces of the universe....
GPS jamming is not as casual as is talked about. The signals come from above. If navigating using it, you will want your antenna pointed upwards. If the jammer is below you, your antenna hears much less of the jammer.
As for replacing linear accelerometers and ring laser gyros with atomic interferometry, at very small sizes I would suspect the wave nature of atoms being used to measure the phase change otherwise found in the laser ring is going to be incredibly noisy.
I doubt this is coming anytime soon, or maybe ever.
He had accelerometer-based inertial navigation systems for years before GPS. It wasn’t very precise, and there were some notable instances of failures in military ops, but it was better than nothing if there was no VOR/TACAN/Loran signal available.
“If the jammer is below you, your antenna hears much less of the jammer.”
Ground-based jammers interfere with GPS at flight levels all the time.
The 1/R^2 reality combines with antenna receive pattern to make this a rare thing. The receiver goes from 1 mile range to jamming to 10 miles. That’s a X10 and squared in the denominator.
This is just not a casual thing.
BTW Glonass has a different downlink frequency vs GPS. And Galileo different from both, as is China’s and Japan’s constellations. Receivers easily built to use all simultaneously
Thanks for the ping. Looks like a three-way Nobel Prize in Physics is in their future.
Inertia navigation has one big problem. Propagation of errors. Each tiny error it makes in its position and calculations adds up to large errors for where the device actually is. To be practical it needs to be updated with verified positions on a regular basis.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.