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 <ke...@rowett.org> To: <time-nuts@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 _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
