[ntp:questions] demonstrate traceability to UTC
unruh-spam at physics.ubc.ca
Thu Mar 12 17:12:15 UTC 2009
Tom <tom_e_tek at hotmail.com> writes:
>How do you demonstrate the traceability of the NTP solution to BIPM
That is what the stratum is all about. It tells you how far away your clock
is, in terms of servers, from some server which claims to synchronized by a
hardware type clock to UTC. The root dispersion is a conservative estimate
of how far off yo ucould be.
Of course it is possible that your particular route is such that at its
base is a refclock which is someone looking at his $10 wristwatch.
There is no guarentee that the stratum 1 source to which your machine can
trace its time is a good source, but if you have multiple sources, the
chances are high that that one will be regarded as a false ticker.
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