era.ut1tai.md

eraUt1tai

[rv, tai1, tai2] = ERFA.ut1tai(ut11, ut12, dta)

Time scale transformation: Universal Time, UT1, to International Atomic Time, TAI.

Given:

   ut11,ut12  double    UT1 as a 2-part Julian Date
   dta        double    UT1-TAI in seconds

Returned:

   tai1,tai2  double    TAI as a 2-part Julian Date

Returned (function value):

              int       status:  0 = OK

Notes:

1. ut11+ut12 is Julian Date, apportioned in any convenient way between the two arguments, for example where ut11 is the Julian Day Number and ut12 is the fraction of a day. The returned tai1,tai2 follow suit.

2. The argument dta, i.e. UT1-TAI, is an observed quantity, and is available from IERS tabulations.

Reference:

Explanatory Supplement to the Astronomical Almanac, P. Kenneth Seidelmann (ed), University Science Books (1992)

This revision: 2021 May 11

Copyright (C) 2013-2021, NumFOCUS Foundation. Derived, with permission, from the SOFA library.