File Coverage

erfasrc/src/pn06a.c

Criterion	Covered	Total	%
statement	0	4	0.0
branch			n/a
condition			n/a
subroutine			n/a
pod			n/a
total	0	4	0.0

line	stmt	code
1		#include "erfa.h"
2
3	0	void eraPn06a(double date1, double date2,
4		double dpsi, double deps, double *epsa,
5		double rb[3][3], double rp[3][3], double rbp[3][3],
6		double rn[3][3], double rbpn[3][3])
7		/*
8		** - - - - - - - - -
9		** e r a P n 0 6 a
10		** - - - - - - - - -
11		**
12		** Precession-nutation, IAU 2006/2000A models: a multi-purpose function,
13		** supporting classical (equinox-based) use directly and CIO-based use
14		** indirectly.
15		**
16		** Given:
17		** date1,date2 double TT as a 2-part Julian Date (Note 1)
18		**
19		** Returned:
20		** dpsi,deps double nutation (Note 2)
21		** epsa double mean obliquity (Note 3)
22		** rb double[3][3] frame bias matrix (Note 4)
23		** rp double[3][3] precession matrix (Note 5)
24		** rbp double[3][3] bias-precession matrix (Note 6)
25		** rn double[3][3] nutation matrix (Note 7)
26		** rbpn double[3][3] GCRS-to-true matrix (Notes 8,9)
27		**
28		** Notes:
29		**
30		** 1) The TT date date1+date2 is a Julian Date, apportioned in any
31		** convenient way between the two arguments. For example,
32		** JD(TT)=2450123.7 could be expressed in any of these ways,
33		** among others:
34		**
35		** date1 date2
36		**
37		** 2450123.7 0.0 (JD method)
38		** 2451545.0 -1421.3 (J2000 method)
39		** 2400000.5 50123.2 (MJD method)
40		** 2450123.5 0.2 (date & time method)
41		**
42		** The JD method is the most natural and convenient to use in
43		** cases where the loss of several decimal digits of resolution
44		** is acceptable. The J2000 method is best matched to the way
45		** the argument is handled internally and will deliver the
46		** optimum resolution. The MJD method and the date & time methods
47		** are both good compromises between resolution and convenience.
48		**
49		** 2) The nutation components (luni-solar + planetary, IAU 2000A) in
50		** longitude and obliquity are in radians and with respect to the
51		** equinox and ecliptic of date. Free core nutation is omitted;
52		** for the utmost accuracy, use the eraPn06 function, where the
53		** nutation components are caller-specified.
54		**
55		** 3) The mean obliquity is consistent with the IAU 2006 precession.
56		**
57		** 4) The matrix rb transforms vectors from GCRS to mean J2000.0 by
58		** applying frame bias.
59		**
60		** 5) The matrix rp transforms vectors from mean J2000.0 to mean of
61		** date by applying precession.
62		**
63		** 6) The matrix rbp transforms vectors from GCRS to mean of date by
64		** applying frame bias then precession. It is the product rp x rb.
65		**
66		** 7) The matrix rn transforms vectors from mean of date to true of
67		** date by applying the nutation (luni-solar + planetary).
68		**
69		** 8) The matrix rbpn transforms vectors from GCRS to true of date
70		** (CIP/equinox). It is the product rn x rbp, applying frame bias,
71		** precession and nutation in that order.
72		**
73		** 9) The X,Y,Z coordinates of the IAU 2006/2000A Celestial
74		** Intermediate Pole are elements (3,1-3) of the GCRS-to-true
75		** matrix, i.e. rbpn[2][0-2].
76		**
77		** 10) It is permissible to re-use the same array in the returned
78		** arguments. The arrays are filled in the stated order.
79		**
80		** Called:
81		** eraNut06a nutation, IAU 2006/2000A
82		** eraPn06 bias/precession/nutation results, IAU 2006
83		**
84		** Reference:
85		**
86		** Capitaine, N. & Wallace, P.T., 2006, Astron.Astrophys. 450, 855
87		**
88		** Copyright (C) 2013-2019, NumFOCUS Foundation.
89		** Derived, with permission, from the SOFA library. See notes at end of file.
90		*/
91		{
92		/* Nutation. */
93	0	eraNut06a(date1, date2, dpsi, deps);
94
95		/* Remaining results. */
96	0	eraPn06(date1, date2, dpsi, deps, epsa, rb, rp, rbp, rn, rbpn);
97
98	0	return;
99
100		}
101		/*----------------------------------------------------------------------
102		**
103		**
104		** Copyright (C) 2013-2019, NumFOCUS Foundation.
105		** All rights reserved.
106		**
107		** This library is derived, with permission, from the International
108		** Astronomical Union's "Standards of Fundamental Astronomy" library,
109		** available from http://www.iausofa.org.
110		**
111		** The ERFA version is intended to retain identical functionality to
112		** the SOFA library, but made distinct through different function and
113		** file names, as set out in the SOFA license conditions. The SOFA
114		** original has a role as a reference standard for the IAU and IERS,
115		** and consequently redistribution is permitted only in its unaltered
116		** state. The ERFA version is not subject to this restriction and
117		** therefore can be included in distributions which do not support the
118		** concept of "read only" software.
119		**
120		** Although the intent is to replicate the SOFA API (other than
121		** replacement of prefix names) and results (with the exception of
122		** bugs; any that are discovered will be fixed), SOFA is not
123		** responsible for any errors found in this version of the library.
124		**
125		** If you wish to acknowledge the SOFA heritage, please acknowledge
126		** that you are using a library derived from SOFA, rather than SOFA
127		** itself.
128		**
129		**
130		** TERMS AND CONDITIONS
131		**
132		** Redistribution and use in source and binary forms, with or without
133		** modification, are permitted provided that the following conditions
134		** are met:
135		**
136		** 1 Redistributions of source code must retain the above copyright
137		** notice, this list of conditions and the following disclaimer.
138		**
139		** 2 Redistributions in binary form must reproduce the above copyright
140		** notice, this list of conditions and the following disclaimer in
141		** the documentation and/or other materials provided with the
142		** distribution.
143		**
144		** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
145		** the International Astronomical Union nor the names of its
146		** contributors may be used to endorse or promote products derived
147		** from this software without specific prior written permission.
148		**
149		** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
150		** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
151		** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
152		** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
153		** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
154		** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
155		** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
156		** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
157		** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
158		** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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160		** POSSIBILITY OF SUCH DAMAGE.
161		**
162		*/