Hi Bob:

Modern military GPS receivers are jam resistant (proof?).  It's my understa=
nding that we have jammers that can be turned=20
on in active war zones which will totally shut down a civilian L1 type rece=
iver and not effect a military GPS that's=20
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 addition=
 to GPS including Iridium, the Chinese=20
Compass, Russian GLONASS, etc.

LORAN-C has been shut down in the U.S. but still is operating in other coun=
tries.

The Low & High Frequency Time stations I expect to keep ticking no mater wh=
at 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

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