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/*
*+
* Name:
* palDtt
* Purpose:
* Return offset between UTC and TT
* Language:
* Starlink ANSI C
* Type of Module:
* Library routine
* Invocation:
* dtt = palDtt( double utc );
* Arguments:
* utc = double (Given)
* UTC date as a modified JD (JD-2400000.5)
* Returned Value:
* dtt = double
* TT-UTC in seconds
* Description:
* Increment to be applied to Coordinated Universal Time UTC to give
* Terrestrial Time TT (formerly Ephemeris Time ET)
* Authors:
* TIMJ: Tim Jenness (JAC, Hawaii)
* PTW: Patrick T. Wallace
* {enter_new_authors_here}
* Notes:
* - Consider a comprehensive upgrade to use the time transformations in SOFA's time
* cookbook: http://www.iausofa.org/sofa_ts_c.pdf.
* - See eraDat for a description of error conditions when calling this function
* with a time outside of the UTC range. This behaviour differs from slaDtt.
* History:
* 2012-02-08 (TIMJ):
* Initial version
* Adapted with permission from the Fortran SLALIB library.
* {enter_further_changes_here}
* Copyright:
* Copyright (C) 1995 Rutherford Appleton Laboratory
* Copyright (C) 2012 Science and Technology Facilities Council.
* All Rights Reserved.
* Licence:
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
* Bugs:
* {note_any_bugs_here}
*-
*/
#include "pal.h"
double palDtt( double utc ) {
return 32.184 + palDat( utc );
}
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