If I read the paper correctly you can skip the choke ring if you mount the
antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
lengths. The choke ring is for portable survey antenna that can't be
placed on tall rooftop masts. I think a 2 meter pole on a roof pretty
much
On 4/18/13 12:01 AM, Chris Albertson wrote:
If I read the paper correctly you can skip the choke ring if you mount the
antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
lengths. The choke ring is for portable survey antenna that can't be
placed on tall rooftop masts. I
On 04/18/2013 04:00 PM, Jim Lux wrote:
On 4/18/13 12:01 AM, Chris Albertson wrote:
If I read the paper correctly you can skip the choke ring if you mount
the
antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
lengths. The choke ring is for portable survey antenna that can't
start a new thread.
Tom Knox act...@hotmail.com
Date: Thu, 18 Apr 2013 19:58:22 +0200
From: mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Subject: Re: [time-nuts] antennas was Re: Common-View GPS Network
On 04/18/2013 04:00 PM, Jim Lux wrote:
On 4/18/13 12:01 AM, Chris Albertson wrote
know the history of these ,I can find almost
nothing.
Email me directly if you have info, or I can start a new thread.
Tom Knox act...@hotmail.com
Date: Thu, 18 Apr 2013 19:58:22 +0200
From: mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Subject: Re: [time-nuts] antennas was Re: Common-View
Magnus, Jim,
On 04/18/2013 04:00 PM, Jim Lux wrote:
On 4/18/13 12:01 AM, Chris Albertson wrote:
If I read the paper correctly you can skip the choke ring if you mount
the
antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
lengths. The choke ring is for portable survey
On 4/18/13 1:40 PM, b...@lysator.liu.se wrote:
All of the high quality GNSS receiver manufacturers have their own
version of correlator that try to mitigate multipath. See for example
this Ashtech-document (for a ca 10 year old L1 only receiver (DG14/16)).
Another way to ask this question is what is the effect of a small
deviation form the ideal dimensions?
If we assume deviations of about 1/20th of a wavelength are OK then we can
allow about 1cm of dimensional error. Almost anyone using simple hand
tools can do better.
With care using primitive
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] antennas was Re: Common-View GPS Network
Another way to ask this question is what is the effect of a small
On 4/17/13 12:18 PM, Chris Albertson wrote:
Another way to ask this question is what is the effect of a small
deviation form the ideal dimensions?
If we assume deviations of about 1/20th of a wavelength are OK then we can
allow about 1cm of dimensional error. Almost anyone using simple hand
From: li...@lazygranch.com
But the pan is just a ground plane. It isn't a reflector based on the type
of antennas I saw in the photograph.
=
If you are referring to my antenna farm photo, that's correct. It is also
magnetic, so it holds the pucks in place.
On 4/16/2013 1:55 AM, Jim Lux wrote:
On 4/15/13 10:22 PM, Jim Lux wrote:
On 4/15/13 9:27 PM, Tom Van Baak wrote:
NIST SIM GPS common view pinwheel
described in one of the NIST reports as an aperture coupled slot fed
array that is better than a patch, but not as large and heavy as a choke
On 4/16/13 5:19 PM, Sarah White wrote:
I just have to ask though... cake pans? really? I can't imagine it would
even be possible to modify a cake pan with enough accuracy to get a
usable antenna.
Sure.. cake pans, like other stamped goods, are actually pretty high
precision, because they're
From: Sarah White
I just have to ask though... cake pans? really? I can't imagine it would
even be possible to modify a cake pan with enough accuracy to get a
usable antenna.
-- Sarah
Well, my GPS antenna farm uses an inverted baking tray
On 4/15/13 10:22 PM, Jim Lux wrote:
On 4/15/13 9:27 PM, Tom Van Baak wrote:
NIST SIM GPS common view pinwheel
described in one of the NIST reports as an aperture coupled slot fed
array that is better than a patch, but not as large and heavy as a choke
ring.
W. Kunysz, 2000, “High
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