[ntp:questions] Slow convergence of NTP with GPS/PPS

David Woolley david at ex.djwhome.demon.co.uk.invalid
Thu Oct 23 22:29:28 UTC 2008

Unruh wrote:

> Of course it might be. However he also talks about atomic clocks and gps

The marketing hype is such in this area that most people who use the 
term mean a radio clock (including GPS), rather than a true, physically 
local, atomic clock.  It's particularly used for VLF clocks, using the 1 
baud slow time code (e.g. MSF, without the fine time signal).  Such VLF 
clocks are not normally even corrected for light travel time.

NTP users are more likely to mean GPS based devices.

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