On Sun, 31 Mar 2002, Mike Silbersack wrote:
>
> On Sat, 30 Mar 2002, Leo Bicknell wrote:
>
> > Your NTP servers are better.
> >
> > I tested a III Plus, and without a 1 PPS source (which that model
> > doesn't provide) it's accurate to about 100ms, give or take. Since
> > real NTP servers are < 1ms, they really aren't that good. It's
> > not that the time isn't accurate, it's that they were not designed
> > to communicate with that accuracy to an external device.
>
> OTOH, 100ms is pretty close; I doubt many people need time better than
> that. The one big advantage I can see with using a GPS receiver vs NTP
> servers is security & reliability; I've always worried that my clock
> might start to drift to a misconfigured NTP server. Taken to a paranoid
> level, you could worry that someone was faking NTP replies to throw your
> clocks off. :)
This is the answer I was kinda hoping for. I think that accuracy
to ~100ms from a known source is a little more comforting than <1ms from a
server that I have no control over. I am not maintaining a space program,
just a dozen machines in my room that really serve no other purpose than
personal entertainment.
Thanks for all the replies!
>
> So, even at 100ms accuracy, it might be better to use a local GPS unit.
>
> <shrug>
>
> Mike "Silby" Silbersack
>
>
Paul H.
"Don't underestimate the power of stupid people in large groups"
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