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> [...]and uses military-grade GPS to ferry it to a secure bay[...] Something tells me Gatwick isn't actually in possession of the decryption key for the US Ai
by avar 8y ago
> [...]and uses military-grade GPS to ferry it to a secure bay[...]
Something tells me Gatwick isn't actually in possession of the decryption key for the US Air Force's P (precise) signal and this is just some PR person taking it too far.
- metaphor 8y agoIt's probably safe to conclude that they don't, but you don't need COMSEC crypto keys to achieve "military-grade" accuracy down to 10cm either, i.e. differential GPS[1]. [1] https://www.effective-solutions.co.uk/beacons.html https://www.effective-solutions.co.uk/beacons.html
- djsumdog 8y agoYea I was on a project where a professor lent us a Trimble GPS (I think they ran $2k ~ $4k at the time). It had a backpack, synced up with a tower at the local airport and gave us information down to a couple of centimeters.
- Brakenshire 8y agoMaybe they’re using GPS as a generic term, can access to military-level precision be bought for the non-US satellite positioning systems?
- Rebelgecko 8y agoProbably not, since the main benefits of the military signals are improved resistance to jamming/spoofing, and having a signal that can continue to work if the civilian signal is turned off. If you sell those keys to random businesses they become less effective
- endorphone 8y agohttps://www.broadcom.com/company/news/product-releases/2302120 https://www.broadcom.com/company/news/product-releases/23021... That is certainly "military grade".
- Reason077 8y agoIt's a myth that civilian GPS is less precise than military. A modern, dual-frequency or augmented civilian GPS receiver is just as precise as a military GPS. P may have once stood for precise, but now days the main advantage of the encrypted, military P signal is that it prevents spoofing attacks.
- black-tea 8y agoIt used to be true but in 2000 Selective Availability was disabled which made the civilian signal just as precise. This is basically why GPS took off around that time despite having been in operation for two decades at that point.
- eps 8y agoIt's just one of many whys. Differential GPS was widely available and it gave cm-level positioning precision. Equally if not more important why was your good old hardware minituarization and its cost reduction. In the late 90s a decent GPS reciever was still a size of thick book and cost prohibitively.
- black-tea 8y agoThat would have been no problem in a car. But pre 2000s civilian GPS was useless for street level navigation.
- eps 8y agoNo, it wasn't useless. Again, coupled with differential corrections (available for free over radio) the resulting precision was in centimeter range. The reason it wasn't used was the physical size and cost (for hand-held navigation) and the lack of supporting hardware in cars (no user-facing on-board systems with screens and UI). SA was _not_ the reason for the lack of consumer-level GPS adoption.
- mcculley 8y ago
- Scoundreller 8y agoI wonder how they got GPS to work so well in a concrete car-park.
- thinkingemote 8y agoIt's the long term car park, open outside not multi story and at about half a mile from the terminals. They are removing loads of lamp posts though...
- sowbug 8y agoAre there any meaningful uses of that term? It's a fairly reliable indicator of cluelessness when followed by "encryption."