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?
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@roeckx.be> wrote:
---------- Forwarded message ----------
From: IERS EOP Product Center <iers.eoppc@obspm.fr>
To: bulc.iers@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@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