[time-nuts] GPS Jammers
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY As a brief side note - eBay is full of gps jammers for drivers (or spouses) that don't want their whereabouts known. They are small 1.5ghz transmitters with a range of a few 100 feet that disable gps trackers and APRS type systems... Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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.
Re: [time-nuts] GPS Jammers
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Tom: I've also seen the three antenna version on the asian discount web pages. Do you know if any of them have test reports? I question of the one that looks like a cigarette lighter with a 1" whip antenna can do much. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Tom Clifton wrote: > As a brief side note - eBay is full of gps jammers for > drivers (or spouses) that don't want their whereabouts > known. They are small 1.5ghz transmitters with a > range of a few 100 feet that disable gps trackers and > APRS type systems... > > > > > Never miss a thing. Make Yahoo your home page. > http://www.yahoo.com/r/hs > > ___ > 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. > ___ 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.
Re: [time-nuts] GPS Jammers
From: Brooke Clarke <[EMAIL PROTECTED]> Subject: Re: [time-nuts] GPS Jammers Date: Tue, 13 Nov 2007 17:11:46 -0800 Message-ID: <[EMAIL PROTECTED]> > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Hi Tom: > > I've also seen the three antenna version on the asian discount web pages. > Do you know if any of them have test reports? > I question of the one that looks like a cigarette lighter with a 1" whip > antenna can do much. 10 km radius have been measured with similar properties. Cheers, Magnus ___ 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.
Re: [time-nuts] GPS Jammers
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Magnus Danielson wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > From: Brooke Clarke <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] GPS Jammers > Date: Tue, 13 Nov 2007 17:11:46 -0800 > Message-ID: <[EMAIL PROTECTED]> > > >> ); SAEximRunCond expanded to false >> Errors-To: [EMAIL PROTECTED] RETRY >> >> Hi Tom: >> >> I've also seen the three antenna version on the asian discount web pages. >> Do you know if any of them have test reports? >> I question of the one that looks like a cigarette lighter with a 1" whip >> antenna can do much. >> > > 10 km radius have been measured with similar properties. > > Cheers, > Magnus It really doesn't take much! One of my favorite GPS jamming incidents of public record is the one at the link: http://www.gpsworld.com/gpsworld/article/articleDetail.jsp?id=43404 For another look at things, please see: http://www.gpsworld.com/gpsworld/article/articleDetail.jsp?id=43432 Bringing this back on the topic of time :) The Fall 2007 issue of the magazine "Inside GNSS" has an interesting article "Fuzzy Time - GPS-Based Synchronizers in the Presence of Interference" For a CW signal, a GPS timing receiver's performance begins to degrade when the interfering signal is at a level of -87 dBm. With an FM interference source, it starts to degrade at -106 dBm. Well worth the read if you can find this magazine. Bruce -- 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.
Re: [time-nuts] GPS Jammers
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY >> I question of the one that looks like a cigarette lighter with >> a 1" whip antenna can do much. > 10 km radius have been measured with similar properties. 1 over R-squared makes a huge difference. I'm always amazed when I get reminders like this one. -- These are my opinions, not necessarily my employer's. I hate spam. ___ 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.
