[LEAPSECS] Fwd: Bulletin C number 42

[Richard B. Langley]

See comment about cessation of leap seconds and questionnaire towards  
the end of the item.
-- Richard Langley


> From: IERS EOP Product Center <services.iers at obspm.fr>



> Date: 2011•07•08 10:04:45 AM ADT

> To: bulc.iers at obspm.fr

> Subject: Bulletin C number 42

>

>

>

>

>     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, 8 July 2011

>

>

>                                             Bulletin C 42

>

>                                             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  

> 2011.

> 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

>

>

> IMPORTANT: After years of discussions, a proposal to fundamentally  

> redefine

> UTC will come to a conclusive vote in January 2012 at the ITU-R in  

> Geneva.

>

> This proposal would halt the intercalary adjustments known as leap  

> seconds

> that maintain UTC as a form of Universal Time.

>

> The Earth Orientation Center of the IERS organizes a survey online  

> with the

> objective to find out the strength of opinion for maintaining or  

> changing

> the present system.

>

> Link to the questionnaire:

>

> http://hpiers.obspm.fr/eop-pc/index.php?index=questionnaire

>

> Your response is appreciated before 30 August 2011

> __________________________________________




-----------------------------------------------------------------------------

| Richard B. Langley                            E-mail:  

lang at unb.ca         |

| Geodetic Research Laboratory                  Web: http://www.unb.ca/GGE/ 

  |

| Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506  

453-5142   |

| University of New Brunswick                   Fax:      +1 506  

453-4943   |

| Fredericton, N.B., Canada  E3B  

5A3                                        |

|        Fredericton?  Where's that?  See: http:// 

www.fredericton.ca/       |
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