File Coverage

erfasrc/src/ee00.c

Criterion	Covered	Total	%
statement	0	3	0.0
branch			n/a
condition			n/a
subroutine			n/a
pod			n/a
total	0	3	0.0

line	stmt	code
1		#include "erfa.h"
2
3	0	double eraEe00(double date1, double date2, double epsa, double dpsi)
4		/*
5		** - - - - - - - -
6		** e r a E e 0 0
7		** - - - - - - - -
8		**
9		** The equation of the equinoxes, compatible with IAU 2000 resolutions,
10		** given the nutation in longitude and the mean obliquity.
11		**
12		** Given:
13		** date1,date2 double TT as a 2-part Julian Date (Note 1)
14		** epsa double mean obliquity (Note 2)
15		** dpsi double nutation in longitude (Note 3)
16		**
17		** Returned (function value):
18		** double equation of the equinoxes (Note 4)
19		**
20		** Notes:
21		**
22		** 1) The TT date date1+date2 is a Julian Date, apportioned in any
23		** convenient way between the two arguments. For example,
24		** JD(TT)=2450123.7 could be expressed in any of these ways,
25		** among others:
26		**
27		** date1 date2
28		**
29		** 2450123.7 0.0 (JD method)
30		** 2451545.0 -1421.3 (J2000 method)
31		** 2400000.5 50123.2 (MJD method)
32		** 2450123.5 0.2 (date & time method)
33		**
34		** The JD method is the most natural and convenient to use in
35		** cases where the loss of several decimal digits of resolution
36		** is acceptable. The J2000 method is best matched to the way
37		** the argument is handled internally and will deliver the
38		** optimum resolution. The MJD method and the date & time methods
39		** are both good compromises between resolution and convenience.
40		**
41		** 2) The obliquity, in radians, is mean of date.
42		**
43		** 3) The result, which is in radians, operates in the following sense:
44		**
45		** Greenwich apparent ST = GMST + equation of the equinoxes
46		**
47		** 4) The result is compatible with the IAU 2000 resolutions. For
48		** further details, see IERS Conventions 2003 and Capitaine et al.
49		** (2002).
50		**
51		** Called:
52		** eraEect00 equation of the equinoxes complementary terms
53		**
54		** References:
55		**
56		** Capitaine, N., Wallace, P.T. and McCarthy, D.D., "Expressions to
57		** implement the IAU 2000 definition of UT1", Astronomy &
58		** Astrophysics, 406, 1135-1149 (2003)
59		**
60		** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
61		** IERS Technical Note No. 32, BKG (2004)
62		**
63		** Copyright (C) 2013-2019, NumFOCUS Foundation.
64		** Derived, with permission, from the SOFA library. See notes at end of file.
65		*/
66		{
67		double ee;
68
69
70		/* Equation of the equinoxes. */
71	0	ee = dpsi * cos(epsa) + eraEect00(date1, date2);
72
73	0	return ee;
74
75		}
76		/*----------------------------------------------------------------------
77		**
78		**
79		** Copyright (C) 2013-2019, NumFOCUS Foundation.
80		** All rights reserved.
81		**
82		** This library is derived, with permission, from the International
83		** Astronomical Union's "Standards of Fundamental Astronomy" library,
84		** available from http://www.iausofa.org.
85		**
86		** The ERFA version is intended to retain identical functionality to
87		** the SOFA library, but made distinct through different function and
88		** file names, as set out in the SOFA license conditions. The SOFA
89		** original has a role as a reference standard for the IAU and IERS,
90		** and consequently redistribution is permitted only in its unaltered
91		** state. The ERFA version is not subject to this restriction and
92		** therefore can be included in distributions which do not support the
93		** concept of "read only" software.
94		**
95		** Although the intent is to replicate the SOFA API (other than
96		** replacement of prefix names) and results (with the exception of
97		** bugs; any that are discovered will be fixed), SOFA is not
98		** responsible for any errors found in this version of the library.
99		**
100		** If you wish to acknowledge the SOFA heritage, please acknowledge
101		** that you are using a library derived from SOFA, rather than SOFA
102		** itself.
103		**
104		**
105		** TERMS AND CONDITIONS
106		**
107		** Redistribution and use in source and binary forms, with or without
108		** modification, are permitted provided that the following conditions
109		** are met:
110		**
111		** 1 Redistributions of source code must retain the above copyright
112		** notice, this list of conditions and the following disclaimer.
113		**
114		** 2 Redistributions in binary form must reproduce the above copyright
115		** notice, this list of conditions and the following disclaimer in
116		** the documentation and/or other materials provided with the
117		** distribution.
118		**
119		** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
120		** the International Astronomical Union nor the names of its
121		** contributors may be used to endorse or promote products derived
122		** from this software without specific prior written permission.
123		**
124		** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
125		** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
126		** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
127		** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
128		** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
129		** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
130		** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
131		** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
132		** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
133		** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
134		** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
135		** POSSIBILITY OF SUCH DAMAGE.
136		**
137		*/