[time-nuts] GPS antenna in snowy environment (was: LEA-6T Software.)
bg at lysator.liu.se
Thu Aug 28 09:30:32 EDT 2014
Note that the high accurcy geodetic snow cones for chokering antenns have moved towards thin spherical designs.
<div>-------- Originalmeddelande --------</div><div>Från: Chris Albertson <albertson.chris at gmail.com> </div><div>Datum:2014-08-28 15:17 (GMT+01:00) </div><div>Till: Discussion of precise time and frequency measurement <time-nuts at febo.com> </div><div>Rubrik: Re: [time-nuts] GPS antenna in snowy environment (was: LEA-6T
</div>The same shape that keeps bird off the antenna also keeps birds off.
It is worth getting the tall cone shape no matter where you live.
On Thu, Aug 28, 2014 at 6:04 AM, Attila Kinali <attila at kinali.ch> wrote:
> On Mon, 25 Aug 2014 10:48:51 -0400
> Dan Kemppainen <dan at irtelemetrics.com> wrote:
>> Also, I have a low cost antenna coming. It's one of the Synergy systems
>> puck type amplified antennas. I remember some time back a bit of chatter
>> about improving GPS antennas for timing, by providing some sort of guard
>> ring or choke to prevent low angle reception. Are there any good links
>> anyone could provide on what may be worth building or playing with. Keep
>> in mind, I live in snow country (~300 inches/year) so a something that
>> gathers a lot of snow could be undesirable! :)
> How much snow you get is mostly irrelevant. It's more important
> how much accumulates ;-)
> A cone hat over your antenna should solve quite a bit of the issue.
> The problem is, that you need quite a steep cone or you need to heat
> it constantly above 0°C, as snow tends to stick to everything, even
> smooth walls.
> Maybe also worth a try would be to grease the cone. But i've only heard
> of that and never seen it in action. So i cannot tell whether that helps
> in any way.
> Attila Kinali
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