Re: off topic - leap second to be added

From: Divyadarshan Purohit via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 29 May 2015 10:41:30 +0530
Dear Friends,

Thanks for wonderful information.I would be grateful if you could send me
some more details about reason for the difference between UTC & Atomic Time
.Kindly also some details about benefit of adding the leap second.
best regards,
DDPurohit

On Fri, May 29, 2015 at 2:50 AM, jmfranke--- via Seesat-l <
seesat-l_at_satobs.org> wrote:

> Yes,
>
> Date: Mon, 05 Jan 2015 14:25:49 +0100
> From: IERS EOP Product Center <services.iers_at_obspm.fr>
> Reply-To: IERS EOP Product Center <services.iers_at_obspm.fr>
> To: bulc.iers_at_obspm.fr
>
>
>
>
>       INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
>
> SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE
>
> SERVICE DE LA ROTATION TERRESTRE DE L'IERS
> 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 2015
>
>                                                Bulletin C 49
>
>   To authorities responsible for the measurement and distribution of
> time
>
>
>                                     UTC TIME STEP
>                              on the 1st of July 2015
>
>
>   A positive leap second will be introduced at the end of June 2015.
>   The sequence of dates of the UTC second markers will be:
>
>                            2015 June 30,     23h 59m 59s
>                            2015 June 30,     23h 59m 60s
>                            2015 July  1,      0h  0m  0s
>
>   The difference between UTC and the International Atomic Time TAI is:
>
>    from 2012 July 1,    0h UTC, to 2015 July 1  0h UTC  : UTC-TAI = - 35s
>    from 2015 July 1,    0h UTC, until further notice    : UTC-TAI = - 36s
>
>
>
>   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
> ---- Kevin Fetter via Seesat-l <seesat-l_at_satobs.org> wrote:
> > A leap second will be added, on June 30.
> > _______________________________________________
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> > http://mailman.satobs.org/mailman/listinfo/seesat-l
>
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>



-- 
Divyadarshan D.Purohit
Gurudev Observatory,
Vadodara
India
http://www.gurudevobservatory.co.in/
https://www.flickr.com/photos/gurudevobservatory/sets/
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Received on Fri May 29 2015 - 00:12:41 UTC

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