[time-nuts] GPS Jamming in the UK
Bruce Rahn
brahn at woh.rr.com
Tue Nov 13 13:43:55 EST 2007
GandalfG8 at aol.com wrote:
> I've not come across this before and when a friend first fowarded the link
> from another group I thought it was a spoof, and still only half convinced:-),
> but I've just copied this from the official Ofcom Website in the UK......
> "The Ministry of Defence conduct occasional tests on military systems which
> may result in some loss of service to civilian users of the Global
> Positioning System (GPS) including in-car navigation devices and networks which rely on
> GPS signals. Ofcom seeks to provide citizens and consumers with information
> about possible interruptions to these services via these email updates giving
> advanced notification of these tests. It must be emphasised that this
> notification process only warns of future jamming excercises that are brought to
> the notice of Ofcom and may not cover all jamming exercises. It cannot be
> assumed that any loss of service is due to jamming exercises."
> There's an option to sign up for email notification.....
> _http://www.ofcom.org.uk/static/subscribe/select_list.htm_
> (http://www.ofcom.org.uk/static/subscribe/select_list.htm)
> Anyone come across this before or actually experienced any identifiable
> jamming of signals?
> regards
> Nigel GM8PZR
Nigel,
GPS 'denial of service' (aka jamming) tests are fairly common here in
the US. In 'another life', I was involved with them. Public notice is
given in advance of planned testing.
You might find this link of interest:
http://www.fly-low.com/features02/gpsdenial.html
This link provides a listing of past, current, and future denial of
service tests:
http://www.navcen.uscg.gov/gps/gpsnotices/GPS_Interference.pdf
There have also been documented cases of inadvertent/unscheduled tests.
With a little bit of searching, you can find them :)
What you're reading about is real! Hope this helps a little.
Bruce -- WB9ANQ
--
Bruce Rahn
Wisdom has two parts:
1. having a lot to say; and
2. not saying it!
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