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Diffstat (limited to 'ast/erfa/tcgtt.c')
-rw-r--r-- | ast/erfa/tcgtt.c | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/ast/erfa/tcgtt.c b/ast/erfa/tcgtt.c deleted file mode 100644 index 0e463b4..0000000 --- a/ast/erfa/tcgtt.c +++ /dev/null @@ -1,118 +0,0 @@ -#include "erfa.h" - -int eraTcgtt(double tcg1, double tcg2, double *tt1, double *tt2) -/* -** - - - - - - - - - -** e r a T c g t t -** - - - - - - - - - -** -** Time scale transformation: Geocentric Coordinate Time, TCG, to -** Terrestrial Time, TT. -** -** Given: -** tcg1,tcg2 double TCG as a 2-part Julian Date -** -** Returned: -** tt1,tt2 double TT as a 2-part Julian Date -** -** Returned (function value): -** int status: 0 = OK -** -** Note: -** -** tcg1+tcg2 is Julian Date, apportioned in any convenient way -** between the two arguments, for example where tcg1 is the Julian -** Day Number and tcg22 is the fraction of a day. The returned -** tt1,tt2 follow suit. -** -** References: -** -** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),. -** IERS Technical Note No. 32, BKG (2004) -** -** IAU 2000 Resolution B1.9 -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - -/* 1977 Jan 1 00:00:32.184 TT, as MJD */ - static const double t77t = ERFA_DJM77 + ERFA_TTMTAI/ERFA_DAYSEC; - - -/* Result, safeguarding precision. */ - if ( tcg1 > tcg2 ) { - *tt1 = tcg1; - *tt2 = tcg2 - ( ( tcg1 - ERFA_DJM0 ) + ( tcg2 - t77t ) ) * ERFA_ELG; - } else { - *tt1 = tcg1 - ( ( tcg2 - ERFA_DJM0 ) + ( tcg1 - t77t ) ) * ERFA_ELG; - *tt2 = tcg2; - } - -/* OK status. */ - 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. -** -*/ |