File Coverage

erfasrc/src/pn00a.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 eraPn00a(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 0 a
10		** - - - - - - - - -
11		**
12		** Precession-nutation, IAU 2000A model: a multi-purpose function,
13		** supporting classical (equinox-based) use directly and CIO-based
14		** use 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 eraPn00 function, where the
53		** nutation components are caller-specified. For faster but
54		** slightly less accurate results, use the eraPn00b function.
55		**
56		** 3) The mean obliquity is consistent with the IAU 2000 precession.
57		**
58		** 4) The matrix rb transforms vectors from GCRS to J2000.0 mean
59		** equator and equinox by applying frame bias.
60		**
61		** 5) The matrix rp transforms vectors from J2000.0 mean equator and
62		** equinox to mean equator and equinox of date by applying
63		** precession.
64		**
65		** 6) The matrix rbp transforms vectors from GCRS to mean equator and
66		** equinox of date by applying frame bias then precession. It is
67		** the product rp x rb.
68		**
69		** 7) The matrix rn transforms vectors from mean equator and equinox
70		** of date to true equator and equinox of date by applying the
71		** nutation (luni-solar + planetary).
72		**
73		** 8) The matrix rbpn transforms vectors from GCRS to true equator and
74		** equinox of date. It is the product rn x rbp, applying frame
75		** bias, precession and nutation in that order.
76		**
77		** 9) The X,Y,Z coordinates of the IAU 2000A Celestial Intermediate
78		** Pole are elements (3,1-3) of the GCRS-to-true matrix,
79		** i.e. rbpn[2][0-2].
80		**
81		** 10) It is permissible to re-use the same array in the returned
82		** arguments. The arrays are filled in the order given.
83		**
84		** Called:
85		** eraNut00a nutation, IAU 2000A
86		** eraPn00 bias/precession/nutation results, IAU 2000
87		**
88		** Reference:
89		**
90		** Capitaine, N., Chapront, J., Lambert, S. and Wallace, P.,
91		** "Expressions for the Celestial Intermediate Pole and Celestial
92		** Ephemeris Origin consistent with the IAU 2000A precession-
93		** nutation model", Astron.Astrophys. 400, 1145-1154 (2003)
94		**
95		** n.b. The celestial ephemeris origin (CEO) was renamed "celestial
96		** intermediate origin" (CIO) by IAU 2006 Resolution 2.
97		**
98		** Copyright (C) 2013-2019, NumFOCUS Foundation.
99		** Derived, with permission, from the SOFA library. See notes at end of file.
100		*/
101		{
102		/* Nutation. */
103	0	eraNut00a(date1, date2, dpsi, deps);
104
105		/* Remaining results. */
106	0	eraPn00(date1, date2, dpsi, deps, epsa, rb, rp, rbp, rn, rbpn);
107
108	0	return;
109
110		}
111		/*----------------------------------------------------------------------
112		**
113		**
114		** Copyright (C) 2013-2019, NumFOCUS Foundation.
115		** All rights reserved.
116		**
117		** This library is derived, with permission, from the International
118		** Astronomical Union's "Standards of Fundamental Astronomy" library,
119		** available from http://www.iausofa.org.
120		**
121		** The ERFA version is intended to retain identical functionality to
122		** the SOFA library, but made distinct through different function and
123		** file names, as set out in the SOFA license conditions. The SOFA
124		** original has a role as a reference standard for the IAU and IERS,
125		** and consequently redistribution is permitted only in its unaltered
126		** state. The ERFA version is not subject to this restriction and
127		** therefore can be included in distributions which do not support the
128		** concept of "read only" software.
129		**
130		** Although the intent is to replicate the SOFA API (other than
131		** replacement of prefix names) and results (with the exception of
132		** bugs; any that are discovered will be fixed), SOFA is not
133		** responsible for any errors found in this version of the library.
134		**
135		** If you wish to acknowledge the SOFA heritage, please acknowledge
136		** that you are using a library derived from SOFA, rather than SOFA
137		** itself.
138		**
139		**
140		** TERMS AND CONDITIONS
141		**
142		** Redistribution and use in source and binary forms, with or without
143		** modification, are permitted provided that the following conditions
144		** are met:
145		**
146		** 1 Redistributions of source code must retain the above copyright
147		** notice, this list of conditions and the following disclaimer.
148		**
149		** 2 Redistributions in binary form must reproduce the above copyright
150		** notice, this list of conditions and the following disclaimer in
151		** the documentation and/or other materials provided with the
152		** distribution.
153		**
154		** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
155		** the International Astronomical Union nor the names of its
156		** contributors may be used to endorse or promote products derived
157		** from this software without specific prior written permission.
158		**
159		** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
160		** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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162		** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
163		** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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171		**
172		*/