tttai¶

erfa.tttai(tt1, tt2)[source]¶

Time scale transformation: Terrestrial Time, TT, to International Atomic Time, TAI.

Parameters:

tt1double array
tt2double array

Returns:

tai1double array
tai2double array

Notes

Wraps ERFA function eraTttai. The ERFA documentation is:

- - - - - - - - -
 e r a T t t a i
- - - - - - - - -

Time scale transformation:  Terrestrial Time, TT, to International
Atomic Time, TAI.

Given:
   tt1,tt2    double    TT as a 2-part Julian Date

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

Returned (function value):
              int       status:  0 = OK

Note:

   tt1+tt2 is Julian Date, apportioned in any convenient way between
   the two arguments, for example where tt1 is the Julian Day Number
   and tt2 is the fraction of a day.  The returned tai1,tai2 follow
   suit.

References:

   McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
   IERS Technical Note No. 32, BKG (2004)

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

This revision:  2021 May 11

Copyright (C) 2013-2023, NumFOCUS Foundation.
Derived, with permission, from the SOFA library.  See notes at end of file.

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tttai¶