Dan,
The classic Aeroantenna SPIKE snow cone.
http://www.ngs.noaa.gov/ANTCAL/LoadImage?name=AERAT1675_120%2BSPKE.t.jpg
The old Ashtech snow cone
http://www.ngs.noaa.gov/ANTCAL/LoadImage?name=ASH700936A_M%2BNONE.t.jpg
Both of the above will keep birds looking for another place to rest.
You can get a good view of typical high-end GPS antennas with an image search
like:
https://www.google.com/search?tbm=ischq=cors+gps+antenna
For examples of antenna and winter conditions, try these:
https://www.google.com/search?tbm=ischq=gps+antenna+snow
On Thu, 28 Aug 2014 09:15:18 -0400, time-nuts-requ...@febo.com wrote:
Message: 5
Date: Thu, 28 Aug 2014 15:04:36 +0200
From: Attila Kinali att...@kinali.ch
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] GPS antenna in snowy
Björn and Tom,
Thanks for the links. It helps visualize things a lot! Our snow was
unusually weird last year. It stuck on everything, any stick larger than
a pencil had at least basket ball sized hunks of snow on it. That's
probably a worst case scenario, tho.
Joe,
OK on the study of snow. It's
Hi
Most GPS antennas have a preamp in them. All of the common Time Nut antennas
have one. Gain varies from the mid twenties to over 40db between models. You
really do not want much more gain than you need, so more is not generally
better.
Satellite TV coax is the material of choice for GPS
On Mon, 25 Aug 2014 10:48:51 -0400
Dan Kemppainen d...@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
The similar, and more serious issue is bird-poop.
The pointed cone shapes you see for commercial timing receiver
antennas are as much to keep birds from sitting on top of the antennas
as it is to get the snow off.
At least snow will eventually melt off.
--- Graham / KE9H
==
On Thu, Aug 28,
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 att...@kinali.ch wrote:
On Mon, 25 Aug 2014 10:48:51 -0400
Dan Kemppainen d...@irtelemetrics.com wrote:
Also, I
of precise time and frequency measurement
time-nuts@febo.com /divdivRubrik: Re: [time-nuts] GPS antenna in snowy
environment (was: LEA-6T
Software.) /divdiv
/divThe 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
Björn,
Can you provide links to some examples? A picture or two would be great!
Attila,
Almost all the snow we get accumulates. However it does settle, even
then by mid February it's not unusual to see 4 or 5 feet on the ground...
However, that raises a good questions, in terms of cones and
On Thu, 28 Aug 2014 12:00:19 -0400
Dan Kemppainen d...@irtelemetrics.com wrote:
However, that raises a good questions, in terms of cones and shedding
snow. I wonder how a straight slender vertical pipe with capped end
would work. Say 6 feet long. Let the snow build on the top. You might
loose
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