Those "tests" are quite common in the desert southwest. They show up in the notams. I was "jammed" by Nellis AFB while driving offroad. We had a small 3 car caravan and I was leading the way. The gps lost every satellite. I stopped and had to explain to the cars following me that I had to do the rest of the trip by landmarks so it will go slower. This was during Red Flag exercises and I was close to the range border.
I talked to the jammers. Their gear is very COTS. Just a RF generator that has two sources. They make band limited noise, then modulate another generator with the noise on the GPS center frequency. Another time I was driving I-5 near Lemoore Navy airstation and got a different type of jamming. The whole gps display rotate back and forth. No idea how that jamming was done. ------Original Message------ From: Robert Darlington Sender: [email protected] To: Discussion of precise time and frequency measurement ReplyTo: Discussion of precise time and frequency measurement Subject: [time-nuts] GPS "tests" by the DoD Sent: Jan 20, 2011 5:00 PM Did you guys see this one yet? http://www.engadget.com/2011/01/20/faa-warns-of-ongoing-gps-issues-in-southeastern-us-due-to-defens/ _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
