[time-nuts] Mounting GPS Antenna on Steel Roof

[Björn Gabrielsson]

----- Original Message ----- 
From: "Bruce Griffiths" <bruce.griffiths at xtra.co.nz>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
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