source: trunk/FACT++/erfa/src/fane03.c@ 18711

Last change on this file since 18711 was 18711, checked in by tbretz, 8 years ago
Updated to ERFA 1.3.0 (no relevant code change except the leap second at the beginning of 2017)
File size: 4.1 KB
Line 
1#include "erfa.h"
2
3double eraFane03(double t)
4/*
5** - - - - - - - - - -
6** e r a F a n e 0 3
7** - - - - - - - - - -
8**
9** Fundamental argument, IERS Conventions (2003):
10** mean longitude of Neptune.
11**
12** Given:
13** t double TDB, Julian centuries since J2000.0 (Note 1)
14**
15** Returned (function value):
16** double mean longitude of Neptune, radians (Note 2)
17**
18** Notes:
19**
20** 1) Though t is strictly TDB, it is usually more convenient to use
21** TT, which makes no significant difference.
22**
23** 2) The expression used is as adopted in IERS Conventions (2003) and
24** is adapted from Simon et al. (1994).
25**
26** References:
27**
28** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
29** IERS Technical Note No. 32, BKG (2004)
30**
31** Simon, J.-L., Bretagnon, P., Chapront, J., Chapront-Touze, M.,
32** Francou, G., Laskar, J. 1994, Astron.Astrophys. 282, 663-683
33**
34** Copyright (C) 2013-2016, NumFOCUS Foundation.
35** Derived, with permission, from the SOFA library. See notes at end of file.
36*/
37{
38 double a;
39
40
41/* Mean longitude of Neptune (IERS Conventions 2003). */
42 a = fmod(5.311886287 + 3.8133035638 * t, ERFA_D2PI);
43
44 return a;
45
46}
47/*----------------------------------------------------------------------
48**
49**
50** Copyright (C) 2013-2016, NumFOCUS Foundation.
51** All rights reserved.
52**
53** This library is derived, with permission, from the International
54** Astronomical Union's "Standards of Fundamental Astronomy" library,
55** available from http://www.iausofa.org.
56**
57** The ERFA version is intended to retain identical functionality to
58** the SOFA library, but made distinct through different function and
59** file names, as set out in the SOFA license conditions. The SOFA
60** original has a role as a reference standard for the IAU and IERS,
61** and consequently redistribution is permitted only in its unaltered
62** state. The ERFA version is not subject to this restriction and
63** therefore can be included in distributions which do not support the
64** concept of "read only" software.
65**
66** Although the intent is to replicate the SOFA API (other than
67** replacement of prefix names) and results (with the exception of
68** bugs; any that are discovered will be fixed), SOFA is not
69** responsible for any errors found in this version of the library.
70**
71** If you wish to acknowledge the SOFA heritage, please acknowledge
72** that you are using a library derived from SOFA, rather than SOFA
73** itself.
74**
75**
76** TERMS AND CONDITIONS
77**
78** Redistribution and use in source and binary forms, with or without
79** modification, are permitted provided that the following conditions
80** are met:
81**
82** 1 Redistributions of source code must retain the above copyright
83** notice, this list of conditions and the following disclaimer.
84**
85** 2 Redistributions in binary form must reproduce the above copyright
86** notice, this list of conditions and the following disclaimer in
87** the documentation and/or other materials provided with the
88** distribution.
89**
90** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
91** the International Astronomical Union nor the names of its
92** contributors may be used to endorse or promote products derived
93** from this software without specific prior written permission.
94**
95** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
96** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
97** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
98** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
99** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
100** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
101** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
102** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
103** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
104** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
105** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
106** POSSIBILITY OF SUCH DAMAGE.
107**
108*/
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