source: trunk/FACT++/erfa/src/fave03.c@ 19806

Last change on this file since 19806 was 18921, checked in by tbretz, 7 years ago
Updated to ERFA 1.4.0
File size: 4.2 KB
Line 
1#include "erfa.h"
2
3double eraFave03(double t)
4/*
5** - - - - - - - - - -
6** e r a F a v e 0 3
7** - - - - - - - - - -
8**
9** Fundamental argument, IERS Conventions (2003):
10** mean longitude of Venus.
11**
12** Given:
13** t double TDB, Julian centuries since J2000.0 (Note 1)
14**
15** Returned (function value):
16** double mean longitude of Venus, 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** comes from Souchay et al. (1999) after 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** Souchay, J., Loysel, B., Kinoshita, H., Folgueira, M. 1999,
35** Astron.Astrophys.Supp.Ser. 135, 111
36**
37** Copyright (C) 2013-2017, NumFOCUS Foundation.
38** Derived, with permission, from the SOFA library. See notes at end of file.
39*/
40{
41 double a;
42
43
44/* Mean longitude of Venus (IERS Conventions 2003). */
45 a = fmod(3.176146697 + 1021.3285546211 * t, ERFA_D2PI);
46
47 return a;
48
49}
50/*----------------------------------------------------------------------
51**
52**
53** Copyright (C) 2013-2017, NumFOCUS Foundation.
54** All rights reserved.
55**
56** This library is derived, with permission, from the International
57** Astronomical Union's "Standards of Fundamental Astronomy" library,
58** available from http://www.iausofa.org.
59**
60** The ERFA version is intended to retain identical functionality to
61** the SOFA library, but made distinct through different function and
62** file names, as set out in the SOFA license conditions. The SOFA
63** original has a role as a reference standard for the IAU and IERS,
64** and consequently redistribution is permitted only in its unaltered
65** state. The ERFA version is not subject to this restriction and
66** therefore can be included in distributions which do not support the
67** concept of "read only" software.
68**
69** Although the intent is to replicate the SOFA API (other than
70** replacement of prefix names) and results (with the exception of
71** bugs; any that are discovered will be fixed), SOFA is not
72** responsible for any errors found in this version of the library.
73**
74** If you wish to acknowledge the SOFA heritage, please acknowledge
75** that you are using a library derived from SOFA, rather than SOFA
76** itself.
77**
78**
79** TERMS AND CONDITIONS
80**
81** Redistribution and use in source and binary forms, with or without
82** modification, are permitted provided that the following conditions
83** are met:
84**
85** 1 Redistributions of source code must retain the above copyright
86** notice, this list of conditions and the following disclaimer.
87**
88** 2 Redistributions in binary form must reproduce the above copyright
89** notice, this list of conditions and the following disclaimer in
90** the documentation and/or other materials provided with the
91** distribution.
92**
93** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
94** the International Astronomical Union nor the names of its
95** contributors may be used to endorse or promote products derived
96** from this software without specific prior written permission.
97**
98** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
99** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
100** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
101** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
102** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
103** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
104** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
105** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
106** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
107** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
108** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
109** POSSIBILITY OF SUCH DAMAGE.
110**
111*/
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