File Coverage

erfasrc/src/atciq.c
Criterion Covered Total %
statement 0 8 0.0
branch n/a
condition n/a
subroutine n/a
pod n/a
total 0 8 0.0


line stmt bran cond sub pod time code
1             #include "erfa.h"
2              
3 0           void eraAtciq(double rc, double dc,
4             double pr, double pd, double px, double rv,
5             eraASTROM *astrom, double *ri, double *di)
6             /*
7             ** - - - - - - - - -
8             ** e r a A t c i q
9             ** - - - - - - - - -
10             **
11             ** Quick ICRS, epoch J2000.0, to CIRS transformation, given precomputed
12             ** star-independent astrometry parameters.
13             **
14             ** Use of this function is appropriate when efficiency is important and
15             ** where many star positions are to be transformed for one date. The
16             ** star-independent parameters can be obtained by calling one of the
17             ** functions eraApci[13], eraApcg[13], eraApco[13] or eraApcs[13].
18             **
19             ** If the parallax and proper motions are zero the eraAtciqz function
20             ** can be used instead.
21             **
22             ** Given:
23             ** rc,dc double ICRS RA,Dec at J2000.0 (radians)
24             ** pr double RA proper motion (radians/year; Note 3)
25             ** pd double Dec proper motion (radians/year)
26             ** px double parallax (arcsec)
27             ** rv double radial velocity (km/s, +ve if receding)
28             ** astrom eraASTROM* star-independent astrometry parameters:
29             ** pmt double PM time interval (SSB, Julian years)
30             ** eb double[3] SSB to observer (vector, au)
31             ** eh double[3] Sun to observer (unit vector)
32             ** em double distance from Sun to observer (au)
33             ** v double[3] barycentric observer velocity (vector, c)
34             ** bm1 double sqrt(1-|v|^2): reciprocal of Lorenz factor
35             ** bpn double[3][3] bias-precession-nutation matrix
36             ** along double longitude + s' (radians)
37             ** xpl double polar motion xp wrt local meridian (radians)
38             ** ypl double polar motion yp wrt local meridian (radians)
39             ** sphi double sine of geodetic latitude
40             ** cphi double cosine of geodetic latitude
41             ** diurab double magnitude of diurnal aberration vector
42             ** eral double "local" Earth rotation angle (radians)
43             ** refa double refraction constant A (radians)
44             ** refb double refraction constant B (radians)
45             **
46             ** Returned:
47             ** ri,di double CIRS RA,Dec (radians)
48             **
49             ** Notes:
50             **
51             ** 1) All the vectors are with respect to BCRS axes.
52             **
53             ** 2) Star data for an epoch other than J2000.0 (for example from the
54             ** Hipparcos catalog, which has an epoch of J1991.25) will require a
55             ** preliminary call to eraPmsafe before use.
56             **
57             ** 3) The proper motion in RA is dRA/dt rather than cos(Dec)*dRA/dt.
58             **
59             ** Called:
60             ** eraPmpx proper motion and parallax
61             ** eraLdsun light deflection by the Sun
62             ** eraAb stellar aberration
63             ** eraRxp product of r-matrix and pv-vector
64             ** eraC2s p-vector to spherical
65             ** eraAnp normalize angle into range 0 to 2pi
66             **
67             ** Copyright (C) 2013-2019, NumFOCUS Foundation.
68             ** Derived, with permission, from the SOFA library. See notes at end of file.
69             */
70             {
71             double pco[3], pnat[3], ppr[3], pi[3], w;
72              
73              
74             /* Proper motion and parallax, giving BCRS coordinate direction. */
75 0           eraPmpx(rc, dc, pr, pd, px, rv, astrom->pmt, astrom->eb, pco);
76              
77             /* Light deflection by the Sun, giving BCRS natural direction. */
78 0           eraLdsun(pco, astrom->eh, astrom->em, pnat);
79              
80             /* Aberration, giving GCRS proper direction. */
81 0           eraAb(pnat, astrom->v, astrom->em, astrom->bm1, ppr);
82              
83             /* Bias-precession-nutation, giving CIRS proper direction. */
84 0           eraRxp(astrom->bpn, ppr, pi);
85              
86             /* CIRS RA,Dec. */
87 0           eraC2s(pi, &w, di);
88 0           *ri = eraAnp(w);
89              
90             /* Finished. */
91              
92 0           }
93             /*----------------------------------------------------------------------
94             **
95             **
96             ** Copyright (C) 2013-2019, NumFOCUS Foundation.
97             ** All rights reserved.
98             **
99             ** This library is derived, with permission, from the International
100             ** Astronomical Union's "Standards of Fundamental Astronomy" library,
101             ** available from http://www.iausofa.org.
102             **
103             ** The ERFA version is intended to retain identical functionality to
104             ** the SOFA library, but made distinct through different function and
105             ** file names, as set out in the SOFA license conditions. The SOFA
106             ** original has a role as a reference standard for the IAU and IERS,
107             ** and consequently redistribution is permitted only in its unaltered
108             ** state. The ERFA version is not subject to this restriction and
109             ** therefore can be included in distributions which do not support the
110             ** concept of "read only" software.
111             **
112             ** Although the intent is to replicate the SOFA API (other than
113             ** replacement of prefix names) and results (with the exception of
114             ** bugs; any that are discovered will be fixed), SOFA is not
115             ** responsible for any errors found in this version of the library.
116             **
117             ** If you wish to acknowledge the SOFA heritage, please acknowledge
118             ** that you are using a library derived from SOFA, rather than SOFA
119             ** itself.
120             **
121             **
122             ** TERMS AND CONDITIONS
123             **
124             ** Redistribution and use in source and binary forms, with or without
125             ** modification, are permitted provided that the following conditions
126             ** are met:
127             **
128             ** 1 Redistributions of source code must retain the above copyright
129             ** notice, this list of conditions and the following disclaimer.
130             **
131             ** 2 Redistributions in binary form must reproduce the above copyright
132             ** notice, this list of conditions and the following disclaimer in
133             ** the documentation and/or other materials provided with the
134             ** distribution.
135             **
136             ** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
137             ** the International Astronomical Union nor the names of its
138             ** contributors may be used to endorse or promote products derived
139             ** from this software without specific prior written permission.
140             **
141             ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
142             ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
143             ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
144             ** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
145             ** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
146             ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
147             ** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
148             ** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
149             ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
150             ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
151             ** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
152             ** POSSIBILITY OF SUCH DAMAGE.
153             **
154             */