nanog mailing list archives

Re: F-ckin Leap Seconds, how do they work?


From: Roy <r.engehausen () gmail com>
Date: Thu, 05 Jul 2012 11:02:57 -0700

On 7/5/2012 10:42 AM, Steve Allen wrote:
On Thu 2012-07-05T10:26:22 -0700, Roy hath writ:
Lets see.  There have been nine leap seconds in 20 years.  So at the
start of the next century the difference will probably be less than a minute
There is no predicting how large the decadal variations in LOD will be,
but the difference should be somewhere between 1 minute and 3 minutes.
Please see these charts and tables for how unpredictable it is.
http://www.ucolick.org/~sla/leapsecs/dutc.html

Remember OpenTime is only for people who want their system clocks to
ignore leap seconds.  I don't include myself among the possible users of
OpenTime.
Anyone who needs that can already do that using existing, deployed,
and tested code and hardware and the GPS system time scale.  Please
see this worked example.  Please do not invent yet another private
time scale.
http://www.ucolick.org/~sla/leapsecs/right+gps.html

...

So basically the concept of OpenTime is already implemented. All that's needed is a list of Stratum-1 servers that anyone can use.




Current thread: