[time-nuts] GPS Jamming in the UK
n3izn at aol.com
n3izn at aol.com
Tue Nov 13 13:13:22 EST 2007
I was involved in deploying one of the early CDMA networks here. CDMA relies on GPS for it's timing and has a GPS unit at every site. I was told that sometimes they put in an offset or a warble(?) to confuse the civilian units. The manufacture of the GPS units had to go through several revisions to provide accurate time to the sites. I haven't heard about any problems in quite a while, but then again I've been working on those Global Standard Mess systems lately.
From: GandalfG8 at aol.com
To: time-nuts at febo.com
Sent: Tue, 13 Nov 2007 8:50 am
Subject: [time-nuts] GPS Jamming in the UK
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
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
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.....
Anyone come across this before or actually experienced any identifiable
jamming of signals?
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