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The US and EU are looking into backups for GPS. For short-range, can use GPS-like beacons. This will work well for airports and close to cities. It is probably
by ianburrell 3y ago
The US and EU are looking into backups for GPS. For short-range, can use GPS-like beacons. This will work well for airports and close to cities. It is probably worth doing for increased accuracy.
There is talk of reviving eLoran which is enhancement of Loran long-range navigation. But countries keep shutting down transmitters because of lack of use.
Finally, it might be possible to use other satellite constellations for navigation. In particular, it sounds like Iridium provides timing information. In the worst, could add something the big constellations like Starlink.
- nradov 3y agoYes, there is active research underway in using other satellite constellations as a backup to GPS. The Iridium constellation is in LEO with only a small number of spares, so it's even less survivable than Navstar (GPS). Starlink may be a better long term option because there are just a lot more satellites and it's easier to replace attrition losses. In theory, manufacturing and launch capacity could be scaled up to the level where replacements could be sent up faster than the Chinese can shoot them down. https://news.osu.edu/this-algorithm-can-make-satellite-signals-act-like-gps/ https://news.osu.edu/this-algorithm-can-make-satellite-signa...