Somehow I missed this message.
>This probably comes under tha category of more than you want to know...
No, it's NOT more than I want to know, it's what I want to know.
>Stanford published a series of lectures on GPS.
>https://www.youtube.com/playlist?list=PLGvhNIiu1ubyEOJga50LJMzVXtbUq6CPo
>I
On Thursday, July 22, 2021 9:05:47 PM EDT Robert DiRosario wrote:
> If I want to use GPS for time and frequency standards, just how solidly
> does the antenna need to be mounted?
> The easiest and least expensive way to mount a GPS antenna would be up
> on two 10' TV mast sections, but that
>
Hi
The most basic question is: how crazy do you want to go? This *is* TimeNuts so
crazy has very few limitations here …. :)
As mentioned in other posts, get to the point you have a clear view to the sky.
Ideally you want it clear to within 10 degrees of the horizon. You are concerned
both with
Hi,
put the GNSS Ant. on the ground. If you use a magnetic antenna then use a smale
metal reflector on the bottom.
Than use only Sat’s with 30deg elevation (clear sky) After 24h your location 3D
Fix should be good for a proper 1PPS/ToD depends of your GNSS RX. Check DOP
Value.
Thanks
Uwe
I think there might be a down side to using more sensitive GNSS receivers,
which is
that such a receiver will be willing to include more impaired signals in
its time and/or
position solutions, leading to poorer overall accuracy.
Does anybody know?
I certainly concur that good antenna siting is
> especially for covering the 0-satellite case.
It's more complicated than just figuring out the error in the satellite's
clock. You also have to consider the error in the satellite orbit, the
difference between where you think it is and where it actually is.
> I wish stuff like this could
Jeremy, thank you, especially for covering the 0-satellite case.
I wish stuff like this could be on a web page or FAQ or something, where it
was easily discoverable.
--
Sanjeev Gupta
+65 98551208 http://www.linkedin.com/in/ghane
On Fri, Jul 23, 2021 at 9:18 AM Jeremy Elson wrote:
> The
Hi Robert,
Antenna mounting... it kind of depends. First priority is having a good
unobstructed sky view. (Imagine) lying on your back watching the sky, or stars
at night. If there are only minimal obstructions down low in elevation along
the horizon you have a perfect sky view. Another
The question of how GPS receivers get the time is a fascinating one and it
turns out to be absolutely integral to how they determine position. That
is: it is impossible to solve for position without solving for time, and
vice-versa.
One key technical requirement is that all the satellites carry
If you really wanted to be particular about it you could follow Mr. Carlsons
lab on his antenna project.
https://youtu.be/JjNsLEM6goM
-=Bryan=-
From: Robert DiRosario
Sent: July 22, 2021 6:05 PM
To: time-nuts@lists.febo.com
Subject: [time-nuts] GPS antenna
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