source: trunk/FACT++/erfa/src/pmat06.c@ 19713

Last change on this file since 19713 was 18921, checked in by tbretz, 7 years ago
Updated to ERFA 1.4.0
File size: 5.1 KB
Line 
1#include "erfa.h"
2
3void eraPmat06(double date1, double date2, double rbp[3][3])
4/*
5** - - - - - - - - - -
6** e r a P m a t 0 6
7** - - - - - - - - - -
8**
9** Precession matrix (including frame bias) from GCRS to a specified
10** date, IAU 2006 model.
11**
12** Given:
13** date1,date2 double TT as a 2-part Julian Date (Note 1)
14**
15** Returned:
16** rbp double[3][3] bias-precession 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) = rbp * V(GCRS), where
40** the p-vector V(GCRS) is with respect to the Geocentric Celestial
41** Reference System (IAU, 2000) and the p-vector V(date) is with
42** respect to the mean equatorial triad of the given date.
43**
44** Called:
45** eraPfw06 bias-precession F-W angles, IAU 2006
46** eraFw2m F-W angles to r-matrix
47**
48** References:
49**
50** Capitaine, N. & Wallace, P.T., 2006, Astron.Astrophys. 450, 855
51**
52** Wallace, P.T. & Capitaine, N., 2006, Astron.Astrophys. 459, 981
53**
54** Copyright (C) 2013-2017, NumFOCUS Foundation.
55** Derived, with permission, from the SOFA library. See notes at end of file.
56*/
57{
58 double gamb, phib, psib, epsa;
59
60
61/* Bias-precession Fukushima-Williams angles. */
62 eraPfw06(date1, date2, &gamb, &phib, &psib, &epsa);
63
64/* Form the matrix. */
65 eraFw2m(gamb, phib, psib, epsa, rbp);
66
67 return;
68
69}
70/*----------------------------------------------------------------------
71**
72**
73** Copyright (C) 2013-2017, NumFOCUS Foundation.
74** All rights reserved.
75**
76** This library is derived, with permission, from the International
77** Astronomical Union's "Standards of Fundamental Astronomy" library,
78** available from http://www.iausofa.org.
79**
80** The ERFA version is intended to retain identical functionality to
81** the SOFA library, but made distinct through different function and
82** file names, as set out in the SOFA license conditions. The SOFA
83** original has a role as a reference standard for the IAU and IERS,
84** and consequently redistribution is permitted only in its unaltered
85** state. The ERFA version is not subject to this restriction and
86** therefore can be included in distributions which do not support the
87** concept of "read only" software.
88**
89** Although the intent is to replicate the SOFA API (other than
90** replacement of prefix names) and results (with the exception of
91** bugs; any that are discovered will be fixed), SOFA is not
92** responsible for any errors found in this version of the library.
93**
94** If you wish to acknowledge the SOFA heritage, please acknowledge
95** that you are using a library derived from SOFA, rather than SOFA
96** itself.
97**
98**
99** TERMS AND CONDITIONS
100**
101** Redistribution and use in source and binary forms, with or without
102** modification, are permitted provided that the following conditions
103** are met:
104**
105** 1 Redistributions of source code must retain the above copyright
106** notice, this list of conditions and the following disclaimer.
107**
108** 2 Redistributions in binary form must reproduce the above copyright
109** notice, this list of conditions and the following disclaimer in
110** the documentation and/or other materials provided with the
111** distribution.
112**
113** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
114** the International Astronomical Union nor the names of its
115** contributors may be used to endorse or promote products derived
116** from this software without specific prior written permission.
117**
118** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
119** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
120** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
121** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
122** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
123** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
124** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
125** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
126** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
127** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
128** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
129** POSSIBILITY OF SUCH DAMAGE.
130**
131*/
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