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> The military has some additional protections Feel this is somewhat an understatement, it's cryptographically signed and encrypted, as far as protection goes
by Grimburger 5y ago
> The military has some additional protections
Feel this is somewhat an understatement, it's cryptographically signed and encrypted, as far as protection goes it's wandering onto an active battlefield naked vs being in a modern tank.
- withinboredom 5y agoYeah, but that’s all worthless now. The US has lost the number of GPS satellites in the sky. It’s all Russian and EU sats now.
- XorNot 5y agoIt is, but the US basically can't use that mode anymore - the widespread use of GPS guided munitions which do not have the military grade receivers means the US basically doesn't enable the signal degradation mode ever - it harms their own force more then helping any counter-force.
- userbinator 5y agoYou're talking about SA (Selective Availability) but I think the parent comment is referring to the "fine" signal: https://en.wikipedia.org/wiki/GPS_signals#Precision_code https://en.wikipedia.org/wiki/GPS_signals#Precision_code
- jpgvm 5y agoOr more likely the M-code which is the upgraded version of the P(Y) code.
- trasz 5y agoWhy do you assume munitions don’t have the “military grade receivers”?
- kroeckx 5y agoThe newer satellites, of which 5 are in orbit, also have a directional antenna with which they will be able to boost the signal strength 20 dB (100 * power), using a new military M-code that no longer needs the other signals to lock on. The signal is sent both over the wide area and the spot beam antenna. Older satellites will only sent it over a wide area antenna. As far as I understand, this is not operational yet, but is planned for this year.