[amsat-bb] Leap second on June 30, 2012

[Tarsala, Jan A (337C)]

>-----Original Message-----
>From: bulc.iers-bounces at syrte4.obspm.fr
>[mailto:bulc.iers-bounces at syrte4.obspm.fr] On Behalf Of IERS EOP Product
>Center
>Sent: Thursday, January 05, 2012 6:17 AM
>To: bulc.iers at obspm.fr
>Subject: Bulletin C number 43
>
>
>
>
>     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 at obspm.fr
>http://hpiers.obspm.fr/eop-pc
>
>                                              Paris, 5 January 2012
>                  
>                                              Bulletin C 43
>                  
>                                              To authorities responsible
>					      for the measurement and
>					      distribution of time
>
>
>                                   UTC TIME STEP
>                            on the 1st of July 2012
>                  
>
> A positive leap second will be introduced at the end of June 2012.
> The sequence of dates of the UTC second markers will be:		
>		
>                          2012 June 30,     23h 59m 59s
>                          2012 June 30,     23h 59m 60s
>                          2012 July  1,      0h  0m  0s
>              
> The difference between UTC and the International Atomic Time TAI is:
>
>  from 2009 January 1, 0h UTC, to 2012 July 1  0h UTC  : UTC-TAI = - 34s
>  from 2012 July 1,    0h UTC, until further notice    : UTC-TAI = - 35s
>  
> 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
>
>__________________________________________
>