[ntp:questions] Geographical diversity of Stratum 1 servers

Jason Rabel jason at extremeoverclocking.com
Wed Feb 13 17:14:30 UTC 2008


> The GPS computation of location, elevation, and time involves a system 
> of four simultaneous equations which can be solved for time, lattitude, 
> longitude, and elevation.  Doing an extended "site survey" can refine 
> your location and elevation.  The better location data, the better the 
> solution for time.

The Tymserve (assuming model 2100 since that was the last and most popular)
does a site-survey on power-up. Unfortunately you can't manually input your
location (if you know it is more accurate) but the TS2100 does a pretty good
job. It also disciplines an oscillator from the 1PPS so that it can flywheel
in holdover mode.

Jason




More information about the questions mailing list