[time-nuts] Chinese NTP Time server

[Kevin Rowett]

Thanks All for the hints and help!

KR


> On Dec 31, 2019, at 9:37 AM, Gregory Beat via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Kevin -
> 
> Welcome to spherical geometry.  
> Take a globe of the earth and a ball of string or yarn ... 
> and you can create the physical re-creation to “see” how the hole is created.
> ==
> The American GPS constellation consists of 24 satellites in 6 orbital planes with an orbital inclination of 55 degrees (20,180 km or 12,540 miles), MEO (Medium Earth Orbit).  This would create the ~30° “hole” that you observe on the Lady Heather plots from your location.
> Glonass (Russian) constellation uses a 64° inclination.
> 
> Satellite constellations (Wikipedia)
> https://en.wikipedia.org/wiki/Satellite_constellation
> 
> greg
> ===
> Date: Mon, 30 Dec 2019 11:02:22 -0800
> From: Kevin Rowett <kevin at rowett.org>
> To: <time-nuts at lists.febo.com>
> Subject: Re: [time-nuts] Chinese NTP Time server
> 
> I’ve looked at plots posted from many places in NA.  
> They all show the same characteristic.  A large hole of coverage +-30 of north.
> 
> I have mine connected to a very good antenna, with a clear view of the sky, and experience the same lack of coverage.  I had at first attributed it to poor antenna coverage, tried several antenna, then started looking online, and found others showed the same lack of coverage.
> 
> The quest goes on.
> KR
> ===
> Looking at the Sat plot in the lower right of the screen shot (sat position versus SS), what causes, or contributes to the shading +-30 degrees?
> 
> Thanks.
> KR
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