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> Is military GPS more accurate than civilian GPS? > The user range error (URE) of the GPS signals in space is actually the same for the civilian and military
by y04nn 3y ago
> Is military GPS more accurate than civilian GPS?
> The user range error (URE) of the GPS signals in space is actually the same for the civilian and military GPS services. However, most of today's civilian devices use only one GPS frequency, while military receivers use two.
> Using two GPS frequencies improves accuracy by correcting signal distortions caused by Earth's atmosphere. Dual-frequency GPS equipment is commercially available for civilian use, but its cost and size has limited it to professional applications.
> With augmentation systems, civilian users can actually receive better GPS accuracy than the military.
Is it fully true ? So the only advantages of the military GPS is that the codes are unknown and that it is more jamming proof ?
- smachiz 3y agothey also have the ability to fuzz civilian GPS while not doing so for the military... so probably, until they don't want it to be true.
- y04nn 3y agoThey only need to change the CDMA codes of the civilian GPS to render it unusable. Also at the beginning of GPS they purposely added inaccuracies into the timing to make it less precise for civilian use, but because of the FAA and other needs (and methods that have been developed to counter the injected inaccuracies) they finally removed it in 2000. To respond to my question. With long term measurements and the help of the L5 band it is possible to obtain sub-millimeter accuracy [1]! [1]: https://en.wikipedia.org/wiki/Global_Positioning_System https://en.wikipedia.org/wiki/Global_Positioning_System
- KaiserPro 3y agoCivilian GPS signal can be selectively diluted in certain areas, which is useful for stopping most non-military and a large number of military navigation kit.