[ntp:questions] Accuracy of NTP - Advice Needed

Greg Hennessy greg.hennessy at cox.net
Wed Dec 28 04:45:56 UTC 2011


On 2011-12-28, Danny Mayer <mayer at ntp.org> wrote:
> On 12/27/2011 9:08 PM, John Hasler wrote:
>> Danny writes:
>>> GPS is not used for this kind of thing, they are too inaccurate, so it
>>> doesn't matter. They use atomic clocks.
>> 
>> The requirement is for synchronization.  They use common view GPS.
>
> That's not good enough for experiments like this.

In what way is it not good enough? The neutrinos are apparently
arriving about 60 nanoseconds early, the distance is known, through
GPS to 10's of centimeters, and the time is synchronized, again
through GPS (although a second method is used as a double check) to
about 1 nanosecond. In what fashion is it 'not good enough'?



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