File Coverage

erfasrc/src/h2fk5.c

Criterion	Covered	Total	%
statement	0	11	0.0
branch	0	2	0.0
condition			n/a
subroutine			n/a
pod			n/a
total	0	13	0.0

line	stmt	bran	code
1			#include "erfa.h"
2
3	0		void eraH2fk5(double rh, double dh,
4			double drh, double ddh, double pxh, double rvh,
5			double r5, double d5,
6			double dr5, double dd5, double px5, double rv5)
7			/*
8			** - - - - - - - - -
9			** e r a H 2 f k 5
10			** - - - - - - - - -
11			**
12			** Transform Hipparcos star data into the FK5 (J2000.0) system.
13			**
14			** Given (all Hipparcos, epoch J2000.0):
15			** rh double RA (radians)
16			** dh double Dec (radians)
17			** drh double proper motion in RA (dRA/dt, rad/Jyear)
18			** ddh double proper motion in Dec (dDec/dt, rad/Jyear)
19			** pxh double parallax (arcsec)
20			** rvh double radial velocity (km/s, positive = receding)
21			**
22			** Returned (all FK5, equinox J2000.0, epoch J2000.0):
23			** r5 double RA (radians)
24			** d5 double Dec (radians)
25			** dr5 double proper motion in RA (dRA/dt, rad/Jyear)
26			** dd5 double proper motion in Dec (dDec/dt, rad/Jyear)
27			** px5 double parallax (arcsec)
28			** rv5 double radial velocity (km/s, positive = receding)
29			**
30			** Notes:
31			**
32			** 1) This function transforms Hipparcos star positions and proper
33			** motions into FK5 J2000.0.
34			**
35			** 2) The proper motions in RA are dRA/dt rather than
36			** cos(Dec)*dRA/dt, and are per year rather than per century.
37			**
38			** 3) The FK5 to Hipparcos transformation is modeled as a pure
39			** rotation and spin; zonal errors in the FK5 catalog are not
40			** taken into account.
41			**
42			** 4) See also eraFk52h, eraFk5hz, eraHfk5z.
43			**
44			** Called:
45			** eraStarpv star catalog data to space motion pv-vector
46			** eraFk5hip FK5 to Hipparcos rotation and spin
47			** eraRv2m r-vector to r-matrix
48			** eraRxp product of r-matrix and p-vector
49			** eraTrxp product of transpose of r-matrix and p-vector
50			** eraPxp vector product of two p-vectors
51			** eraPmp p-vector minus p-vector
52			** eraPvstar space motion pv-vector to star catalog data
53			**
54			** Reference:
55			**
56			** F.Mignard & M.Froeschle, Astron.Astrophys., 354, 732-739 (2000).
57			**
58			** Copyright (C) 2013-2020, NumFOCUS Foundation.
59			** Derived, with permission, from the SOFA library. See notes at end of file.
60			*/
61			{
62			int i;
63			double pvh[2][3], r5h[3][3], s5h[3], sh[3], wxp[3], vv[3], pv5[2][3];
64
65
66			/* Hipparcos barycentric position/velocity pv-vector (normalized). */
67	0		eraStarpv(rh, dh, drh, ddh, pxh, rvh, pvh);
68
69			/* FK5 to Hipparcos orientation matrix and spin vector. */
70	0		eraFk5hip(r5h, s5h);
71
72			/* Make spin units per day instead of per year. */
73	0	0	for ( i = 0; i < 3; s5h[i++] /= 365.25 );
74
75			/* Orient the spin into the Hipparcos system. */
76	0		eraRxp(r5h, s5h, sh);
77
78			/* De-orient the Hipparcos position into the FK5 system. */
79	0		eraTrxp(r5h, pvh[0], pv5[0]);
80
81			/* Apply spin to the position giving an extra space motion component. */
82	0		eraPxp(pvh[0], sh, wxp);
83
84			/* Subtract this component from the Hipparcos space motion. */
85	0		eraPmp(pvh[1], wxp, vv);
86
87			/* De-orient the Hipparcos space motion into the FK5 system. */
88	0		eraTrxp(r5h, vv, pv5[1]);
89
90			/* FK5 pv-vector to spherical. */
91	0		eraPvstar(pv5, r5, d5, dr5, dd5, px5, rv5);
92
93	0		return;
94
95			}
96			/*----------------------------------------------------------------------
97			**
98			**
99			** Copyright (C) 2013-2020, NumFOCUS Foundation.
100			** All rights reserved.
101			**
102			** This library is derived, with permission, from the International
103			** Astronomical Union's "Standards of Fundamental Astronomy" library,
104			** available from http://www.iausofa.org.
105			**
106			** The ERFA version is intended to retain identical functionality to
107			** the SOFA library, but made distinct through different function and
108			** file names, as set out in the SOFA license conditions. The SOFA
109			** original has a role as a reference standard for the IAU and IERS,
110			** and consequently redistribution is permitted only in its unaltered
111			** state. The ERFA version is not subject to this restriction and
112			** therefore can be included in distributions which do not support the
113			** concept of "read only" software.
114			**
115			** Although the intent is to replicate the SOFA API (other than
116			** replacement of prefix names) and results (with the exception of
117			** bugs; any that are discovered will be fixed), SOFA is not
118			** responsible for any errors found in this version of the library.
119			**
120			** If you wish to acknowledge the SOFA heritage, please acknowledge
121			** that you are using a library derived from SOFA, rather than SOFA
122			** itself.
123			**
124			**
125			** TERMS AND CONDITIONS
126			**
127			** Redistribution and use in source and binary forms, with or without
128			** modification, are permitted provided that the following conditions
129			** are met:
130			**
131			** 1 Redistributions of source code must retain the above copyright
132			** notice, this list of conditions and the following disclaimer.
133			**
134			** 2 Redistributions in binary form must reproduce the above copyright
135			** notice, this list of conditions and the following disclaimer in
136			** the documentation and/or other materials provided with the
137			** distribution.
138			**
139			** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
140			** the International Astronomical Union nor the names of its
141			** contributors may be used to endorse or promote products derived
142			** from this software without specific prior written permission.
143			**
144			** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
145			** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
146			** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
147			** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
148			** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
149			** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
150			** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
151			** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
152			** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
153			** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
154			** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
155			** POSSIBILITY OF SUCH DAMAGE.
156			**
157			*/