source: branches/FACT++_lidctrl_usb/erfa/src/pmat06.c@ 19875

Last change on this file since 19875 was 18711, checked in by tbretz, 10 years ago
Updated to ERFA 1.3.0 (no relevant code change except the leap second at the beginning of 2017)
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) 2013-2016, 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) 2013-2016, 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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