[EMAIL PROTECTED] 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! _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.