>-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of IERS EOP Product >Center >Sent: Thursday, January 05, 2012 6:17 AM >To: [email protected] >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 : [email protected] >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 > >__________________________________________ >
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