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Diffstat (limited to 'ast/erfa/tttai.c')
| -rw-r--r-- | ast/erfa/tttai.c | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/ast/erfa/tttai.c b/ast/erfa/tttai.c deleted file mode 100644 index 0392aee..0000000 --- a/ast/erfa/tttai.c +++ /dev/null @@ -1,119 +0,0 @@ -#include "erfa.h" - -int eraTttai(double tt1, double tt2, double *tai1, double *tai2) -/* -** - - - - - - - - - -** 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) -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - -/* TT minus TAI (days). */ - static const double dtat = ERFA_TTMTAI/ERFA_DAYSEC; - - -/* Result, safeguarding precision. */ - if ( tt1 > tt2 ) { - *tai1 = tt1; - *tai2 = tt2 - dtat; - } else { - *tai1 = tt1 - dtat; - *tai2 = tt2; - } - -/* Status (always OK). */ - return 0; - -} -/*---------------------------------------------------------------------- -** -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** All rights reserved. -** -** This library is derived, with permission, from the International -** Astronomical Union's "Standards of Fundamental Astronomy" library, -** available from http://www.iausofa.org. -** -** The ERFA version is intended to retain identical functionality to -** the SOFA library, but made distinct through different function and -** file names, as set out in the SOFA license conditions. The SOFA -** original has a role as a reference standard for the IAU and IERS, -** and consequently redistribution is permitted only in its unaltered -** state. The ERFA version is not subject to this restriction and -** therefore can be included in distributions which do not support the -** concept of "read only" software. -** -** Although the intent is to replicate the SOFA API (other than -** replacement of prefix names) and results (with the exception of -** bugs; any that are discovered will be fixed), SOFA is not -** responsible for any errors found in this version of the library. -** -** If you wish to acknowledge the SOFA heritage, please acknowledge -** that you are using a library derived from SOFA, rather than SOFA -** itself. -** -** -** TERMS AND CONDITIONS -** -** Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions -** are met: -** -** 1 Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** -** 2 Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** -** 3 Neither the name of the Standards Of Fundamental Astronomy Board, -** the International Astronomical Union nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -** POSSIBILITY OF SUCH DAMAGE. -** -*/ |