FW: Bulletin C number 38

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

-----Original Message-----
From: IERS EOP Product Center [mailto:services.iers at obspm.fr] 
Sent: Monday, July 06, 2009 12:46
To: adresc1 at arcas.obspm.fr
Subject: Bulletin C number 38




     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, 4 July 2009
                                                           

                                               Bulletin C 38
                                
                                               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 December 2009.
 The difference between Coordinated Universal Time UTC and the 
 International Atomic Time TAI is :		
		
     from 2009 January 1, 0h UTC, until further notice : UTC-TAI = -34 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