NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Andrés Ruiz
Date: 2008 Jul 4, 11:15 +0200
There's somethin' wrong with the rotation of the world today
I don't know what it is ... (Aerosmith - Living on the Edge)
Andrés
INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
SERVICE
INTERNATIONAL DE
SERVICE DE
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
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
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