[time-nuts] GPS satellite orbits (was: Calculating sidereal time)

[Mark Sims]

I also expected that, but when I added the ability of Lady Heather to plot the SNR/az/el/carrier phase/pseudorange of a given satellite, I found that they repeat every 24-ish hours.  At 12-ish hours the SNR and time the receiver had usable signal was greatly reduced.

----------------

>The main reason is the GPS satellites come close to following the same ground track.
So I'd expect the elevation and azimuth to a given SVN to be the same on a 12 sidereal hour basis.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: prn15.gif
Type: image/gif
Size: 19388 bytes
Desc: prn15.gif
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20190121/ec07cddf/attachment.gif>