[time-nuts] GPS Antenna on Tower.

Bob kb8tq kb8tq at n1k.org
Mon Jun 19 11:59:59 EDT 2017


If you go totally insane, you build a 30’ tall concrete monolith in the middle of a wide open field. The antenna
and ground plane go on top of the monolith. You then grab your chain saw and start knocking down any trees,
towers, or homes that happen to obstruct your perfect view. :) Indeed this is a bit easier if you have a nice big 
budget and can buy (or already own) a giant open chunk of land already. Ex-air bases seem to be an excellent 


> On Jun 19, 2017, at 8:52 AM, Dan Kemppainen <dan at irtelemetrics.com> wrote:
> Hi Bob,
> So, what sorts of things are done for high precision survey work? I would guess a sturdy mount, good sky view, no reflections, good antenna, no nearby radiators, etc. Those all seem like common sense stuff.
> But for applications that really matter, what sorts of things might be missing above. Obviously, really expensive silly things won't be done on my site for a few GPSDO's, but it would be good to know what the issues are.
> Thanks,
> Dan
> On 6/16/2017 6:29 PM, time-nuts-request at febo.com wrote:
>> Hi
>> Will there be an effect? Yes. Are roughly 99% of all GPSDO’s run with antennas mounted that way
>> by “pros” ? Yes again.
>> If you are setting up a reference site for high precision survey work, don’t do it that way. For a GPSDO,
>> you should be fine.
>> Bob
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