i think you are right on the mark, Brooke.
WWVB is the best backup solution.

--Bob A


\On 4/19/2013 1:19 PM, Brooke Clarke wrote:
> Hi Bob:
>
> Modern military GPS receivers are jam resistant (proof?).  It's my unders=
tanding that we have jammers that can be turned
> on in active war zones which will totally shut down a civilian L1 type re=
ceiver and not effect a military GPS that's
> keyed.  The jammers are periodically tested in various parts of the world=
..
> http://www.prc68.com/I/DAGR.shtml
>
> There are a number of satellite based navigation/timing systems in additi=
on to GPS including Iridium, the Chinese
> Compass, Russian GLONASS, etc.
>
> LORAN-C has been shut down in the U.S. but still is operating in other co=
untries.
>
> The Low & High Frequency Time stations I expect to keep ticking no mater =
what since they don't have a military function.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
>
> piclist-request@mit.edu wrote:
>>    [OT] GPS functions during wartime


--=20

The only place success comes before work is in the dictionary.

VINCE LOMBARDI

--=20
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