[time-nuts] GPS Spoofing

[Poul-Henning Kamp]

In message <26BB6F2A-69AC-4587-8057-BA18A03E8A6B at rtty.us>, Bob Camp writes:

>Bumping it a bit this way or that is not an impossibility. A little
>bit of  added phase this way or that is all it would take. You would have 
>to get the rep rate and timing right, but that's just the sort of thing a
>Time Nut knows how to do on the cheap. 

Only its not actually possible in practice.

The problem with GNSS is that the kit to jam/spoof is sub-suitcase-sized.

To jam/spoof LORAN-C or any other VLF system, you need several
trucks: One for the generator, one for the antenna -- at least.

That's the reason why LORSTA's have 600' antenna towers to begin with.

LORAN-C may not be as precise, but it is very stable, which means
that your dual-source nav-kit will tell you that GPS and LORAN-C
diverges in ways that looks odd...

The reason why we still have LORAN-C in europe, is that UK and
France don't trust DoD to not play with GPS.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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