[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)
UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855
1156 High Street Voice: +1 831 459 3046 Lng -122.06015
Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m
More information about the LEAPSECS
mailing list