[ntp:questions] demonstrate traceability to UTC

jlevine jlevine at boulder.nist.gov
Fri Mar 13 13:58:35 UTC 2009


On Mar 12, 10:06 am, Tom <tom_e_... at hotmail.com> wrote:
> To All,
>
> How do you demonstrate the traceability of the NTP solution to BIPM
> UTC?
>
Hello,
   This is a rather complicated question. The answer depends on these
preliminary issues:

   1. Do you need technical traceability, which would be adequate to
provide a time reference derived from national time standards or do
you need *legal* traceability in which you must be prepared to
convince
a jury in an adversary proceeding that your time was correct at some
instant?
   2. What level of accuracy/uncertainty do you need in the time
stamps?
   3. What level of reliability do you need in the process? That is,
suppose
the system that provided the time stamps were to fail. How long could
you
wait for it to be repaired?
   4. Each of these questions is going to have a cost/benefit trade-
off.
How much are you willing to spend (in time or money or ...) to achieve
your requirement?
   I would be happy to discuss these issues in this forum or off-line.

Judah Levine
Time and Frequency Division
NIST Boulder




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