[154430] in North American Network Operators' Group
Re: F-ckin Leap Seconds, how do they work?
daemon@ATHENA.MIT.EDU (Steve Allen)
Tue Jul 3 20:01:01 2012
Date: Tue, 3 Jul 2012 16:59:54 -0700
From: Steve Allen <sla@ucolick.org>
To: nanog@nanog.org
In-Reply-To: <93CF45BC-2753-48D4-9AC6-0926DF4AD815@delong.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Tony Finch dot at dotat.at wrote
> No that is not correct, or at least it's nowhere near as simple as that.
> The atomic second was matched to the second of ephemeris time, and that
> was based on Newcomb's tables of the sun, which in effect used the average
> length of the second from the 1800s.
> http://ucolick.org/~sla/leapsecs/dutc.html
Last fall we held a meeting to consider how UTC might be changed and
what the implications of leaps seconds were. The proceedings fill 400
pages of a book.
For the sound bite version (only 3 pictures) of leap seconds
http://www.ucolick.org/~sla/leapsecs/amsci.html
For a view of the international legal mess caused by leap seconds
http://www.ucolick.org/~sla/leapsecs/epochtime.html
For a blow-by-blow review of the international bureaucratic regulatory
situation for leap seconds see
http://www.ucolick.org/~sla/leapsecs/onlinebib.html
For a worked example that could alleviate the disagreement between
POSIX and leap seconds, and which might break the international
stalemate
http://www.ucolick.org/~sla/leapsecs/right+gps.html
In there are also links to those 400 pages of the book, but I suggest
that this forum is not the best place to rehash this information.
--
Steve Allen <sla@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
