[tz] Fwd: Bulletin C number 58

[David Patte]

For my products I use an algorithm (Meeus; Astronomical Algorithms 1998) 
to 'predict' deltaT into the future. Does anyone have a good source for 
a more recent algorithm that takes into account IERS values since 1998?


On 2019-07-26 21:27, Tim Parenti wrote:
> NIST's leap-seconds.list was finally updated today.  Patch attached.
>
> I'd reached out to Christian Bizouard of IERS a bit ahead of the 
> announcement in the hopes that we could settle the outstanding issues 
> from 2017 with adding a public domain copyright notice to the IERS 
> version of the file, but no luck this time around.
>
> --
> Tim Parenti
>
>
> On Thu, 4 Jul 2019 at 12:11, Kurt Roeckx <kurt at roeckx.be 
> <mailto:kurt at roeckx.be>> wrote:
>
>
>
>
>     ---------- Forwarded message ----------
>     From: IERS EOP Product Center <iers.eoppc at obspm.fr
>     <mailto:iers.eoppc at obspm.fr>>
>     To: bulc.iers at obspm.fr <mailto:bulc.iers at obspm.fr>
>     Cc:
>     Bcc:
>     Date: Thu, 04 Jul 2019 15:06:25 +0200
>     Subject: Bulletin C number 58
>
>
>
>          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 1 40 51 23 35
>     e-mail    : services.iers at obspm.fr <mailto:services.iers at obspm.fr>
>     http://hpiers.obspm.fr/eop-pc
>
>
>                                                   Paris, 04 July 2019
>
>
>                                                   Bulletin C 58
>
>                                                   To authorities
>     responsible
>                                                   for the measurement and
>                                                   distribution of time
>
>
>
>                               INFORMATION ON UTC - TAI
>
>
>      NO leap second will be introduced at the end of December 2019.
>      The difference between Coordinated Universal Time UTC and the
>      International Atomic Time TAI is :
>
>          from 2017 January 1, 0h UTC, until further notice : UTC-TAI =
>     -37 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.
>
>
>                                                 Christian BIZOUARD
>                                                 Director
>                                                 Earth Orientation
>     Center of IERS
>                                                 Observatoire de Paris,
>     France
>
>
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