[time-nuts] The Demise of LORAN (was Re: Reference oscillator accuracy)
Poul-Henning Kamp
phk at phk.freebsd.dk
Sun Nov 15 17:54:09 UTC 2009
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
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
More information about the Time-nuts_lists.febo.com
mailing list