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Posted by Sam Wormley on January 21, 2011, 8:06 pm
Ref:
https://pilotweb.nas.faa.gov/PilotWeb/noticesAction.do?queryType=ALLGPS&formatType=DOMESTIC

!GPS 01/006 (KZMA A0028/11) ZMA NAV GPS IS UNRELIABLE AND MAY BE
UNAVAILABLE WITHIN A CIRCLE RADIUS OF 370 NM AND CENTERED AT
304906N/0802811W OR LOCATION ALSO KNOWN AS 105.25 DEGREE RADIAL 52.1 NM
FROM THE SSI VOR AT FL400; DECREASING IN AREA WITH A DECREASE IN
ALTITUDE TO A CIRCLE WITH A RADIUS OF 325 NM AT FL250; A CIRCLE WITH A
RADIUS OF 260 NM AT 10,000 FEET MSL AND A CIRCLE WITH A RADIUS OF 215 NM
AT 4000 FT AGL 0000-0245 DLY WEF 1101200000-1102110245

On 1/21/11 5:37 PM, Don wrote:

> Good day sir. I was wondering if you could explain why the US east coast GPS
just off the coast of Florida is being shut down for a little more then 2 hours
each day. Is there a problem? Is the system being updated?

> Is new equipment going to come on line? Thank you for any information you can
give me. Take Care...Don


Posted by macpacheco on February 6, 2011, 4:50 am
> Ref:https://pilotweb.nas.faa.gov/PilotWeb/noticesAction.do?queryType=3DAL=
LG...
> !GPS 01/006 (KZMA A0028/11) ZMA NAV GPS IS UNRELIABLE AND MAY BE
> UNAVAILABLE WITHIN A CIRCLE RADIUS OF 370 NM AND CENTERED AT
> 304906N/0802811W OR LOCATION ALSO KNOWN AS 105.25 DEGREE RADIAL 52.1 NM
> FROM THE SSI VOR AT FL400; DECREASING IN AREA WITH A DECREASE IN
> ALTITUDE TO A CIRCLE WITH A RADIUS OF 325 NM AT FL250; A CIRCLE WITH A
> RADIUS OF 260 NM AT 10,000 FEET MSL AND A CIRCLE WITH A RADIUS OF 215 NM
> AT 4000 FT AGL 0000-0245 DLY WEF 1101200000-1102110245
> On 1/21/11 5:37 PM, Don wrote:
> > Good day sir. =A0I was wondering if you could explain why the US east c=
oast GPS just off the coast of Florida is being shut down for a little more=
then 2 hours each day. =A0Is there a problem? =A0Is the system being updat=
ed?
> > Is new equipment going to come on line? =A0Thank you for any informatio=
n you can give me. =A0Take Care...Don

It looks like this serious jamming test was a non event for most users
and was completely blown out of proportion.
FAA is an ultra conservative organization, and they WILL exaggerate
the range of this kind of testing very often.
See below.

http://www.gpsworld.com/transportation/news/gps-testing-southeast-atlantic-=
coast-11054