[LEAPSECS] leap in june

Steve Allen sla at ucolick.org
Sat Jan 10 11:48:31 EST 2015


On Sat 2015-01-10T05:59:39 -0800, Steve Allen hath writ:
> other problems that nobody has talked about openly, and nothing in the
> current versions of the Linux kernel is going to fix those.

In case anyone is talking with news media there is an easy-to-grok
demo of the chaotic handling of the most recent leap second by various
precision time systems which were not Linux boxes per se: Skip
Newhall's 2012 leap second party with his rack full of receivers

https://www.youtube.com/watch?v=MJ_ro4aBez8

Only one of those devices, the Spectracom WWVB receiver, displayed the
leap second in accord with TF.460, and a few months after the leap
NIST changed the phase modulation of WWVB in a way that was expected
to break its ability to maintain a lock on the precise time.

Each of the other receivers did something different than TF.460.

--
Steve Allen                 <sla at ucolick.org>                WGS-84 (GPS)
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