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<p>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?</p>
<p> <br>
</p>
<div class="moz-cite-prefix">On 2019-07-26 21:27, Tim Parenti wrote:<br>
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<blockquote type="cite"
cite="mid:CAFpi07y7Yt_NWrYpOvCNKh-u5wdF731pjaySay-gfxFEZTYDRQ@mail.gmail.com">
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<div>NIST's leap-seconds.list was finally updated today. Patch
attached.</div>
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<div>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.</div>
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<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">--<br>
Tim Parenti<br>
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<div dir="ltr" class="gmail_attr">On Thu, 4 Jul 2019 at 12:11,
Kurt Roeckx <<a href="mailto:kurt@roeckx.be"
moz-do-not-send="true">kurt@roeckx.be</a>> wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
<br>
---------- Forwarded message ----------<br>
From: IERS EOP Product Center <<a
href="mailto:iers.eoppc@obspm.fr" target="_blank"
moz-do-not-send="true">iers.eoppc@obspm.fr</a>><br>
To: <a href="mailto:bulc.iers@obspm.fr" target="_blank"
moz-do-not-send="true">bulc.iers@obspm.fr</a><br>
Cc: <br>
Bcc: <br>
Date: Thu, 04 Jul 2019 15:06:25 +0200<br>
Subject: Bulletin C number 58<br>
<br>
<br>
<br>
INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS
SERVICE (IERS) <br>
<br>
SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES
DE REFERENCE<br>
<br>
<br>
SERVICE DE LA ROTATION TERRESTRE DE L'IERS<br>
OBSERVATOIRE DE PARIS<br>
61, Av. de l'Observatoire 75014 PARIS (France)<br>
Tel. : +33 1 40 51 23 35<br>
e-mail : <a href="mailto:services.iers@obspm.fr"
target="_blank" moz-do-not-send="true">services.iers@obspm.fr</a><br>
<a href="http://hpiers.obspm.fr/eop-pc" rel="noreferrer"
target="_blank" moz-do-not-send="true">http://hpiers.obspm.fr/eop-pc</a><br>
<br>
<br>
Paris, 04 July
2019<br>
<br>
<br>
Bulletin C 58<br>
<br>
To authorities
responsible<br>
for the
measurement and<br>
distribution of
time<br>
<br>
<br>
<br>
INFORMATION ON UTC - TAI<br>
<br>
<br>
NO leap second will be introduced at the end of December
2019.<br>
The difference between Coordinated Universal Time UTC and the<br>
International Atomic Time TAI is :<br>
<br>
from 2017 January 1, 0h UTC, until further notice :
UTC-TAI = -37 s<br>
<br>
Leap seconds can be introduced in UTC at the end of the
months of December<br>
or June, depending on the evolution of UT1-TAI. Bulletin C
is mailed every<br>
six months, either to announce a time step in UTC, or to
confirm that there<br>
will be no time step at the next possible date.<br>
<br>
<br>
Christian BIZOUARD<br>
Director<br>
Earth Orientation
Center of IERS<br>
Observatoire de
Paris, France<br>
<br>
<br>
</blockquote>
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