[time-nuts] The Demise of LORAN (was Re: Reference oscillator accuracy)

[Poul-Henning Kamp]

In message <E1N9i6K-0005pl-F0 at meow.febo.com>, "Mike Monett" writes:

>  It should  be easy to locate a jammer. Go to the area where  the GPS
>  signal is being jammed. Drive in some direction until the  signal is
>  regained. Repeat to find three locations where the signal is lost.

Experience has shown that this is far from as easy as that.

For one thing, you have no assurance that the jammer has isotropic
propagation and your local geometry & obstructions will determine
the subset of sats you have access to.

In military excercises, I have been told the average time to find
a jammer is on the order of "many hours" in an "simulated urban
setting", due to propagation and access issues.

Poul-Henning

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