FW: Bulletin C number 33

[Olson, Arthur David (NIH/NCI) [E]]

-----Original Message-----
From: services.iers at obspm.fr [mailto:services.iers at obspm.fr] 
Sent: Thursday, February 01, 2007 9:49 AM
To: adresc1 at hpopa.obspm.fr
Subject: Bulletin C number 33




     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
Internet  : services.iers at obspm.fr

                                               Paris, 1 February 2007
                                                           

                                               Bulletin C 33
                                
                                               To authorities
responsible                   
                                               for the measurement and 
                                               distribution of time

 



                          INFORMATION ON UTC - TAI
                      

 NO positive leap second will be introduced at the end of June 2007.
 The difference between Coordinated Universal Time UTC and the 
 International Atomic Time TAI is :		
		
     from 2006 January 1, 0h UTC, until further notice : UTC-TAI = -33 s

 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
                                           Director			
                                           Earth Orientation Center of
IERS
                                           Observatoire de Paris, France