[ntp:questions] NTP architecture recommendation

David J Taylor david-taylor at blueyonder.not-this-bit.nor-this-bit.co.uk
Sun Aug 19 18:30:14 UTC 2007

Richard B. Gilbert wrote:
> I don't think that a 14 channel receiver would be useful!  There
> simply are not that many satellites!  The last I knew, there were 27
> NavStar (GPS) satellites in orbit.  Of these, about seven are usually
> above the horizon at any one time.


There can be more than that - here's an example with 13 visible.


According to this source, there are 31 active satellites:


More in orbit, I expect, now dead.
What do they do with decommissioned GPS satellites?


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