GPS "Testing"

[Mike O'Dell]

i strongly suspect they are testing "selective denial",
the ability to deny GPS in a chosen area. it's supposed
to screw-up the civilian signal but leave the military
(encrypted) signal available to them what have the magic goobers.

	-mo

On 1/21/11 2:31 PM, Brian Hawes wrote:
> Could this be a test to investigate the ability of a near ground-based transmitter to distort or disable GPS over some area?
> I know that Trinity House, who manage our Lighthouses and some other local navigation aids  performed such a test
> and apparently succeeded in distorting GPS over several square miles.
> Not good if the bad guys could do this!
> You are all good guys, right?
>
> Please eat this message after you have read it.
>
> Brian
>
> ________________________________________
> From: tacos-bounces+hawes=herald.ox.ac.uk at rf.org [tacos-bounces+hawes=herald.ox.ac.uk at rf.org] On Behalf Of Doug Gentges [doug.gentges at gmail.com]
> Sent: 21 January 2011 16:51
> To: tacos at amrad.org
> Subject: GPS "Testing"
>
> This seems strange:
>
> https://www.faasafety.gov/files/notices/2011/Jan/GPS_Flight_Advisory_CSFTL11-01_Rel.pdf
>
> "The Department of Defense will conduct GPS tests on January 20th
> through February 22nd
> 2011.  During testing, the GPS signal may be unreliable or unavailable."
>
> "During testing, GPS will be unreliable and may be unavailable with in
> a circle with
> a radius of 370NM and centered at 304906N/0802811W or the location known as
> 105.25 degrees and 52.1 NM from the SSI VOR at FL400; decreasing in area with
> a decrease in altitude to a circle with a radius of 325NM at FL250; a
> circle with a
> radius of 260NM at 10,000FT MSL and a circle with a radius of 215NM at 4,000FT
> AGL."
> (see the PDF for the area that will be impacted, it's off the coast of GA/FL
>
> Doug
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