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authorWilliam Joye <wjoye@cfa.harvard.edu>2017-12-08 18:57:06 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2017-12-08 18:57:06 (GMT)
commit90a861b642f765d5657ab827aedabe3920ff9333 (patch)
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parentfba23129f50db253ed3fbbaa23d6e342bf86068e (diff)
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diff --git a/ast/pal/palDat.c b/ast/pal/palDat.c
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-/*
-*+
-* Name:
-* palDtt
-
-* Purpose:
-* Return offset between UTC and TT
-
-* Language:
-* Starlink ANSI C
-
-* Type of Module:
-* Library routine
-
-* Invocation:
-* dat = palDat( double utc );
-
-* Arguments:
-* utc = double (Given)
-* UTC date as a modified JD (JD-2400000.5)
-
-* Returned Value:
-* dat = double
-* TAI-UTC in seconds
-
-* Description:
-* Increment to be applied to Coordinated Universal Time UTC to give
-* International Atomic Time (TAI).
-
-* Authors:
-* TIMJ: Tim Jenness (JAC, Hawaii)
-* {enter_new_authors_here}
-
-* Notes:
-* - This routine converts the MJD argument to calendar date before calling
-* the SOFA/ERFA eraDat function.
-* - This routine matches the slaDat interface which differs from the eraDat
-* interface. Consider coding directly to the SOFA/ERFA interface.
-* - See eraDat for a description of error conditions when calling this function
-* with a time outside of the UTC range.
-* - The status argument from eraDat is ignored. This is reasonable since the
-* error codes are mainly related to incorrect calendar dates when calculating
-* the JD internally.
-
-* History:
-* 2012-02-08 (TIMJ):
-* Initial version
-* Adapted with permission from the Fortran SLALIB library
-* although the core algorithm is now from SOFA.
-* {enter_further_changes_here}
-
-* Copyright:
-* 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"
-#include "palmac.h"
-
-#include "pal1sofa.h"
-
-double palDat ( double dju ) {
- int iy;
- int im;
- int id;
- int status;
- double fd;
- double deltat;
-
- eraJd2cal( PAL__MJD0, dju,
- &iy, &im, &id, &fd );
-
- status = eraDat( iy, im, id, fd, &deltat );
- return deltat;
-}