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It is pity that Loran-C is being shutdown. It could have made use of all those old Long Wave broadcast transmitters. https://en.wikipedia.org/wiki/Loran-C http
by PoachedSausage 9y ago
It is pity that Loran-C is being shutdown. It could have made use of all those old Long Wave broadcast transmitters.
https://en.wikipedia.org/wiki/Loran-C https://en.wikipedia.org/wiki/Loran-C
- cryptonector 9y agoBut all systems using radio frequencies would be susceptible to jamming. There are alternative GPS systems from Russia, China, and the EU now, no? I suppose the more such systems, the harder for an adversary to jam them all. Of course, some of those are run by potential adversaries, so there's that. You really need inertial guidance and/or terrain recognition (as the Tomahawks used to do back in 1990) as a fallback.
- PoachedSausage 9y agoNot all RF based systems are equal. GPS received signal strength at the Earths surface is around -130 dBm, barely above the thermal noise floor even in a good receiver. Around 1000km (most populated areas) from a Loran-C transmitter putting out 1000kW the signal strength is around -50 dBm. That is 9 orders of magnitude harder to jam. All bets are off if your opponent can wheel out 1000kW jammers.