Burt I. Weiner- "Recently I've had need to operate with two GPS navigation systems in the same car at the same time and I've had to shield the antennas from each other, or at lease get them as far apart as practical on a car otherwise they both seem to interfere with each other and I can lose GPS lock."
If it were a problem with the GPS receivers I'd expect the receiver proximity to be the factor and not the antenna separation. Right now I have a Garmin 60CSx and a Garmin 62s touching each other and sitting next to my inside window receiving satellites without any problem. Most car antennas are just amplified patch type antennas and there is a possibility that the coax from the antennas don't have anywhere near 100% shielding and are re-radiating some of the received signal and the other antenna is picking that up, causing the problem. I'd suspect that it is the antennas and not the receivers. Some people have used this for a practical application for GPS receivers that don't have external antenna connectors and made re-radiating loops for those receivers. http://www.bytethebullet.com/geocaching/reradiating_antenna.htm -Arthur _______________________________________________ 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.