[ntp:questions] NIST vs. pool.ntp.org ?

Jason bmwjason at bmwlt.com
Thu Mar 28 02:16:37 UTC 2013


On 03/27/13 16:45, David Woolley wrote:
> Robert Scott wrote:
>> I am confused about the proper usage of pool.ntp.org and NIST.
<<SNIP>>

> I would hope all the pool servers ultimately reference their national
> equivalent of NIST and therefore what becomes, after the fact, UTC.
>
> I think you will find that Navstar (GPS) and WWV times are traceable to
> NIST.
GPS is traceable to US Naval Observatory, not NIST.

I've not seen a reference that NO and NIST coordinate their time, other 
than that they both contribute to UTC. (Note, according to 
www.time.gov/about.html, USNO and NIST cooperatively provide the 
www.time.gov service.)

>
> MSF times are traceable to NPL.
>
>
>> Are they in competition?  Who normally uses the NIST servers and who
>> uses pool.ntp.org?
>
> The open NIST servers are heavily overloaded, so probably don't serve
> the highest quality time, but they are likely to be around for a long time.
>
Jason



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