[FedCom] New antennas on the Secret Service suburban

[gary]

Unless they can localize the jamming, I just don't see how it could be 
done without a notam. Airports have GPS approach patterns these days.

Here is a typical jamming notam:

 08/012 - GPS UNRELIABLE AND MAY BE UNAVBL WITHIN A 310 NM RADIUS OF 
NAWS CHINA LAKE/ARMITAGE AIRPORT (NID) 354116N/1174126W AT FL400, ENDING 
AT 113W LONGITUDE AND NOT EXTENDNG INTO OAKLAND OCEANIC AIRSPACE. THIS 
AREA DECREASES WITH ALTIUDE TO A CIRCLE OF 260NM RADIUS FROM NID AT 
FL250, 190 NM RADIUS AT 10000 FT, 170 NM RADIUS AT 4000 FT AGL 1430-1800 
DLY 10 AUG 14:30 UNTIL 11 AUG 18:00

Dave Emery wrote:

>On Sun, Aug 08, 2004 at 11:30:29PM -0400, bernieS wrote:
>  
>
>>curiously, my Garmin GPS-V failed to get a fix on *any* GPS satellites
>>during a public outdoor POTUS speaking engagement (it was fine before
>>and afterwards...)
>>
>>can anyone else verify this phenomenon?
>>    
>>
>
>	While I hesitate to discuss this in public, FWIW I noticed that
>my HP/Symmetricom 58540A GPS disciplined frequency and time standard
>had its red alarm LED lit during the height of at least one evening
>session of the DNC in Boston - rebooting it did not make it recover
>that evening, but after the DNC was over it has been fine (LED green).
>That alarm would normally indicate loss of an adaquate lock for accurate
>time and frequency...
>
>	Might mean nothing at all, but I do live only about 10 miles
>from the Fleet center... and there was a CAP in progress and lots
>of other flying hardware buzzing around.
>
>
>
>  
>