File Coverage

erfasrc/src/pnm06a.c

Criterion	Covered	Total	%
statement	5	5	100.0
branch			n/a
condition			n/a
subroutine			n/a
pod			n/a
total	5	5	100.0

line	stmt	code
1		#include "erfa.h"
2
3	13	void eraPnm06a(double date1, double date2, double rnpb[3][3])
4		/*
5		** - - - - - - - - - -
6		** e r a P n m 0 6 a
7		** - - - - - - - - - -
8		**
9		** Form the matrix of precession-nutation for a given date (including
10		** frame bias), IAU 2006 precession and IAU 2000A nutation models.
11		**
12		** Given:
13		** date1,date2 double TT as a 2-part Julian Date (Note 1)
14		**
15		** Returned:
16		** rnpb double[3][3] bias-precession-nutation matrix (Note 2)
17		**
18		** Notes:
19		**
20		** 1) The TT date date1+date2 is a Julian Date, apportioned in any
21		** convenient way between the two arguments. For example,
22		** JD(TT)=2450123.7 could be expressed in any of these ways,
23		** among others:
24		**
25		** date1 date2
26		**
27		** 2450123.7 0.0 (JD method)
28		** 2451545.0 -1421.3 (J2000 method)
29		** 2400000.5 50123.2 (MJD method)
30		** 2450123.5 0.2 (date & time method)
31		**
32		** The JD method is the most natural and convenient to use in
33		** cases where the loss of several decimal digits of resolution
34		** is acceptable. The J2000 method is best matched to the way
35		** the argument is handled internally and will deliver the
36		** optimum resolution. The MJD method and the date & time methods
37		** are both good compromises between resolution and convenience.
38		**
39		** 2) The matrix operates in the sense V(date) = rnpb * V(GCRS), where
40		** the p-vector V(date) is with respect to the true equatorial triad
41		** of date date1+date2 and the p-vector V(GCRS) is with respect to
42		** the Geocentric Celestial Reference System (IAU, 2000).
43		**
44		** Called:
45		** eraPfw06 bias-precession F-W angles, IAU 2006
46		** eraNut06a nutation, IAU 2006/2000A
47		** eraFw2m F-W angles to r-matrix
48		**
49		** Reference:
50		**
51		** Capitaine, N. & Wallace, P.T., 2006, Astron.Astrophys. 450, 855.
52		**
53		** Copyright (C) 2013-2019, NumFOCUS Foundation.
54		** Derived, with permission, from the SOFA library. See notes at end of file.
55		*/
56		{
57		double gamb, phib, psib, epsa, dp, de;
58
59
60		/* Fukushima-Williams angles for frame bias and precession. */
61	13	eraPfw06(date1, date2, &gamb, &phib, &psib, &epsa);
62
63		/* Nutation components. */
64	13	eraNut06a(date1, date2, &dp, &de);
65
66		/* Equinox based nutation x precession x bias matrix. */
67	13	eraFw2m(gamb, phib, psib + dp, epsa + de, rnpb);
68
69	13	return;
70
71		}
72		/*----------------------------------------------------------------------
73		**
74		**
75		** Copyright (C) 2013-2019, NumFOCUS Foundation.
76		** All rights reserved.
77		**
78		** This library is derived, with permission, from the International
79		** Astronomical Union's "Standards of Fundamental Astronomy" library,
80		** available from http://www.iausofa.org.
81		**
82		** The ERFA version is intended to retain identical functionality to
83		** the SOFA library, but made distinct through different function and
84		** file names, as set out in the SOFA license conditions. The SOFA
85		** original has a role as a reference standard for the IAU and IERS,
86		** and consequently redistribution is permitted only in its unaltered
87		** state. The ERFA version is not subject to this restriction and
88		** therefore can be included in distributions which do not support the
89		** concept of "read only" software.
90		**
91		** Although the intent is to replicate the SOFA API (other than
92		** replacement of prefix names) and results (with the exception of
93		** bugs; any that are discovered will be fixed), SOFA is not
94		** responsible for any errors found in this version of the library.
95		**
96		** If you wish to acknowledge the SOFA heritage, please acknowledge
97		** that you are using a library derived from SOFA, rather than SOFA
98		** itself.
99		**
100		**
101		** TERMS AND CONDITIONS
102		**
103		** Redistribution and use in source and binary forms, with or without
104		** modification, are permitted provided that the following conditions
105		** are met:
106		**
107		** 1 Redistributions of source code must retain the above copyright
108		** notice, this list of conditions and the following disclaimer.
109		**
110		** 2 Redistributions in binary form must reproduce the above copyright
111		** notice, this list of conditions and the following disclaimer in
112		** the documentation and/or other materials provided with the
113		** distribution.
114		**
115		** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
116		** the International Astronomical Union nor the names of its
117		** contributors may be used to endorse or promote products derived
118		** from this software without specific prior written permission.
119		**
120		** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
121		** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
122		** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
123		** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
124		** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
125		** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
126		** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
127		** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
128		** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
129		** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
130		** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
131		** POSSIBILITY OF SUCH DAMAGE.
132		**
133		*/