Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astro.louisville.edu/software/xmtel/xmtel-7.1/LEAPSECOND Дата изменения: Thu Jun 18 19:34:27 2015 Дата индексирования: Sun Apr 10 02:15:28 2016 Кодировка: Поисковые слова: south pole

The most recent leap second was added on 2012 June 30:

The protocol files in this version have been updated to UTC1-TAI = -35.


The following IAU Circular describes prior leap seconds.


As announced by the IAU Central Bureau for Astronomical Telegrams
in Circular No. 9004 on 11 December 2008, Bulletin C36 of the
International Earth Rotation and Reference Systems Service announced that a
positive leap second will be added on 1 January 2009.

From http://www.iers.org/products/16/11321/orig/bulletinc-036.txt --


INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)

SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE

SERVICE DE LA ROTATION TERRESTRE
OBSERVATOIRE DE PARIS
61, Av. de l'Observatoire 75014 PARIS (France)
Tel. : 33 (0) 1 40 51 22 26
FAX : 33 (0) 1 40 51 22 91
e-mail : services.iers@obspm.fr
http://hpiers.obspm.fr/eop-pc

Paris, 4 July 2008

Bulletin C 36

To authorities responsible
for the measurement and
distribution of time


UTC TIME STEP
on the 1st of January 2009


A positive leap second will be introduced at the end of December 2008.
The sequence of dates of the UTC second markers will be:

2008 December 31, 23h 59m 59s
2008 December 31, 23h 59m 60s
2009 January 1, 0h 0m 0s

The difference between UTC and the International Atomic Time TAI is:

from 2006 January 1, 0h UTC, to 2009 January 1 0h UTC : UTC-TAI = - 33s
from 2009 January 1, 0h UTC, until further notice : UTC-TAI = - 34s

Leap seconds can be introduced in UTC at the end of the months of December
or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every
six months, either to announce a time step in UTC or to confirm that there
will be no time step at the next possible date.



Daniel GAMBIS
Head
Earth Orientation Center of IERS
Observatoire de Paris, France