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Diffstat (limited to 'ast/erfa/fave03.c')
| -rw-r--r-- | ast/erfa/fave03.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/ast/erfa/fave03.c b/ast/erfa/fave03.c new file mode 100644 index 0000000..b91678c --- /dev/null +++ b/ast/erfa/fave03.c @@ -0,0 +1,111 @@ +#include "erfa.h" + +double eraFave03(double t) +/* +** - - - - - - - - - - +** e r a F a v e 0 3 +** - - - - - - - - - - +** +** Fundamental argument, IERS Conventions (2003): +** mean longitude of Venus. +** +** Given: +** t double TDB, Julian centuries since J2000.0 (Note 1) +** +** Returned (function value): +** double mean longitude of Venus, radians (Note 2) +** +** Notes: +** +** 1) Though t is strictly TDB, it is usually more convenient to use +** TT, which makes no significant difference. +** +** 2) The expression used is as adopted in IERS Conventions (2003) and +** comes from Souchay et al. (1999) after Simon et al. (1994). +** +** References: +** +** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003), +** IERS Technical Note No. 32, BKG (2004) +** +** Simon, J.-L., Bretagnon, P., Chapront, J., Chapront-Touze, M., +** Francou, G., Laskar, J. 1994, Astron.Astrophys. 282, 663-683 +** +** Souchay, J., Loysel, B., Kinoshita, H., Folgueira, M. 1999, +** Astron.Astrophys.Supp.Ser. 135, 111 +** +** Copyright (C) 2013-2016, NumFOCUS Foundation. +** Derived, with permission, from the SOFA library. See notes at end of file. +*/ +{ + double a; + + +/* Mean longitude of Venus (IERS Conventions 2003). */ + a = fmod(3.176146697 + 1021.3285546211 * t, ERFA_D2PI); + + return a; + +} +/*---------------------------------------------------------------------- +** +** +** 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. +** +*/ |