----- Original Message ----- From: "Bruce Griffiths" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Tuesday, March 04, 2008 9:23 AM Subject: Re: [time-nuts] Mounting GPS Antenna on Steel Roof
> Also at least some of the magnetic base antennae are intended to be > mounted on a conducting surface. > > So the preferred mount may be on a ground plane of the recommended size > on the end of a tripod a meter or more in height. > However since you have a magnetic mount its easy to try your method and > see if it causes any observable problems, if it does try a different > mounting scheme. > > Even the experts can get it badly wrong, mounting GPS antennas with > choke ring ground planes mounted on concrete pillars can contribute to > measurement instability whereas such mounts tend to be very stable > mechanically, see: Someone once said the ideal GPS antenna installation wrt to multipath mitigation was a chokering antenna half buried in a large flat (saltwater) sand beach... -- Björn _______________________________________________ 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.
