[ntp:questions] [Thumbgps-devel] good paper on timing and delay

David Woolley david at ex.djwhome.demon.invalid
Tue May 22 20:35:07 UTC 2012

unruh wrote:

> However, the orbit of the sattelite is known exactly. Thus the propagation delay
> can be calculated to nanosecond accuracy once the position of the
> receiver is known, and that can be done by fitting the signals from
> three sattelites. In the network situation, the delay is unkown and

Four.  There are four unknowns:  x, y, z and time.

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