FACT++  1.0
fame03.c
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1 #include "erfa.h"
2 
3 double eraFame03(double t)
4 /*
5 ** - - - - - - - - - -
6 ** e r a F a m e 0 3
7 ** - - - - - - - - - -
8 **
9 ** Fundamental argument, IERS Conventions (2003):
10 ** mean longitude of Mercury.
11 **
12 ** Given:
13 ** t double TDB, Julian centuries since J2000.0 (Note 1)
14 **
15 ** Returned (function value):
16 ** double mean longitude of Mercury, 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) 2013-2015, NumFOCUS Foundation.
38 ** Derived, with permission, from the SOFA library. See notes at end of file.
39 */
40 {
41  double a;
42 
43 /* Mean longitude of Mercury (IERS Conventions 2003). */
44  a = fmod(4.402608842 + 2608.7903141574 * t, ERFA_D2PI);
45 
46  return a;
47 
48 }
49 /*----------------------------------------------------------------------
50 **
51 **
52 ** Copyright (C) 2013-2015, NumFOCUS Foundation.
53 ** All rights reserved.
54 **
55 ** This library is derived, with permission, from the International
56 ** Astronomical Union's "Standards of Fundamental Astronomy" library,
57 ** available from http://www.iausofa.org.
58 **
59 ** The ERFA version is intended to retain identical functionality to
60 ** the SOFA library, but made distinct through different function and
61 ** file names, as set out in the SOFA license conditions. The SOFA
62 ** original has a role as a reference standard for the IAU and IERS,
63 ** and consequently redistribution is permitted only in its unaltered
64 ** state. The ERFA version is not subject to this restriction and
65 ** therefore can be included in distributions which do not support the
66 ** concept of "read only" software.
67 **
68 ** Although the intent is to replicate the SOFA API (other than
69 ** replacement of prefix names) and results (with the exception of
70 ** bugs; any that are discovered will be fixed), SOFA is not
71 ** responsible for any errors found in this version of the library.
72 **
73 ** If you wish to acknowledge the SOFA heritage, please acknowledge
74 ** that you are using a library derived from SOFA, rather than SOFA
75 ** itself.
76 **
77 **
78 ** TERMS AND CONDITIONS
79 **
80 ** Redistribution and use in source and binary forms, with or without
81 ** modification, are permitted provided that the following conditions
82 ** are met:
83 **
84 ** 1 Redistributions of source code must retain the above copyright
85 ** notice, this list of conditions and the following disclaimer.
86 **
87 ** 2 Redistributions in binary form must reproduce the above copyright
88 ** notice, this list of conditions and the following disclaimer in
89 ** the documentation and/or other materials provided with the
90 ** distribution.
91 **
92 ** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
93 ** the International Astronomical Union nor the names of its
94 ** contributors may be used to endorse or promote products derived
95 ** from this software without specific prior written permission.
96 **
97 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
98 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
99 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
100 ** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
101 ** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
102 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
103 ** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
104 ** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
105 ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
106 ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
107 ** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
108 ** POSSIBILITY OF SUCH DAMAGE.
109 **
110 */
ERFA_D2PI
#define ERFA_D2PI
Definition: erfam.h:48
eraFame03
double eraFame03(double t)
Definition: fame03.c:3
t
TT t
Definition: test_client.c:26