update ast 8.6.2

1 files changed, 157 insertions, 0 deletions

diff --git a/ast/erfa/h2fk5.c b/ast/erfa/h2fk5.c
new file mode 100644
index 0000000..ad7e9a6
--- /dev/null
+++ b/ast/erfa/h2fk5.c
@@ -0,0 +1,157 @@
+#include "erfa.h"
+
+void eraH2fk5(double rh, double dh,
+              double drh, double ddh, double pxh, double rvh,
+              double *r5, double *d5,
+              double *dr5, double *dd5, double *px5, double *rv5)
+/*
+**  - - - - - - - - -
+**   e r a H 2 f k 5
+**  - - - - - - - - -
+**
+**  Transform Hipparcos star data into the FK5 (J2000.0) system.
+**
+**  Given (all Hipparcos, epoch J2000.0):
+**     rh      double    RA (radians)
+**     dh      double    Dec (radians)
+**     drh     double    proper motion in RA (dRA/dt, rad/Jyear)
+**     ddh     double    proper motion in Dec (dDec/dt, rad/Jyear)
+**     pxh     double    parallax (arcsec)
+**     rvh     double    radial velocity (km/s, positive = receding)
+**
+**  Returned (all FK5, equinox J2000.0, epoch J2000.0):
+**     r5      double    RA (radians)
+**     d5      double    Dec (radians)
+**     dr5     double    proper motion in RA (dRA/dt, rad/Jyear)
+**     dd5     double    proper motion in Dec (dDec/dt, rad/Jyear)
+**     px5     double    parallax (arcsec)
+**     rv5     double    radial velocity (km/s, positive = receding)
+**
+**  Notes:
+**
+**  1) This function transforms Hipparcos star positions and proper
+**     motions into FK5 J2000.0.
+**
+**  2) The proper motions in RA are dRA/dt rather than
+**     cos(Dec)*dRA/dt, and are per year rather than per century.
+**
+**  3) The FK5 to Hipparcos transformation is modeled as a pure
+**     rotation and spin;  zonal errors in the FK5 catalog are not
+**     taken into account.
+**
+**  4) See also eraFk52h, eraFk5hz, eraHfk5z.
+**
+**  Called:
+**     eraStarpv    star catalog data to space motion pv-vector
+**     eraFk5hip    FK5 to Hipparcos rotation and spin
+**     eraRv2m      r-vector to r-matrix
+**     eraRxp       product of r-matrix and p-vector
+**     eraTrxp      product of transpose of r-matrix and p-vector
+**     eraPxp       vector product of two p-vectors
+**     eraPmp       p-vector minus p-vector
+**     eraPvstar    space motion pv-vector to star catalog data
+**
+**  Reference:
+**
+**     F.Mignard & M.Froeschle, Astron. Astrophys. 354, 732-739 (2000).
+**
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  Derived, with permission, from the SOFA library.  See notes at end of file.
+*/
+{
+   int i;
+   double pvh[2][3], r5h[3][3], s5h[3], sh[3], wxp[3], vv[3], pv5[2][3];
+
+
+/* Hipparcos barycentric position/velocity pv-vector (normalized). */
+   eraStarpv(rh, dh, drh, ddh, pxh, rvh, pvh);
+
+/* FK5 to Hipparcos orientation matrix and spin vector. */
+   eraFk5hip(r5h, s5h);
+
+/* Make spin units per day instead of per year. */
+   for ( i = 0; i < 3; s5h[i++] /= 365.25 );
+
+/* Orient the spin into the Hipparcos system. */
+   eraRxp(r5h, s5h, sh);
+
+/* De-orient the Hipparcos position into the FK5 system. */
+   eraTrxp(r5h, pvh[0], pv5[0]);
+
+/* Apply spin to the position giving an extra space motion component. */
+   eraPxp(pvh[0], sh, wxp);
+
+/* Subtract this component from the Hipparcos space motion. */
+   eraPmp(pvh[1], wxp, vv);
+
+/* De-orient the Hipparcos space motion into the FK5 system. */
+   eraTrxp(r5h, vv, pv5[1]);
+
+/* FK5 pv-vector to spherical. */
+   eraPvstar(pv5, r5, d5, dr5, dd5, px5, rv5);
+
+   return;
+
+}
+/*----------------------------------------------------------------------
+**  
+**  
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  All rights reserved.
+**  
+**  This library is derived, with permission, from the International
+**  Astronomical Union's "Standards of Fundamental Astronomy" library,
+**  available from http://www.iausofa.org.
+**  
+**  The ERFA version is intended to retain identical functionality to
+**  the SOFA library, but made distinct through different function and
+**  file names, as set out in the SOFA license conditions.  The SOFA
+**  original has a role as a reference standard for the IAU and IERS,
+**  and consequently redistribution is permitted only in its unaltered
+**  state.  The ERFA version is not subject to this restriction and
+**  therefore can be included in distributions which do not support the
+**  concept of "read only" software.
+**  
+**  Although the intent is to replicate the SOFA API (other than
+**  replacement of prefix names) and results (with the exception of
+**  bugs;  any that are discovered will be fixed), SOFA is not
+**  responsible for any errors found in this version of the library.
+**  
+**  If you wish to acknowledge the SOFA heritage, please acknowledge
+**  that you are using a library derived from SOFA, rather than SOFA
+**  itself.
+**  
+**  
+**  TERMS AND CONDITIONS
+**  
+**  Redistribution and use in source and binary forms, with or without
+**  modification, are permitted provided that the following conditions
+**  are met:
+**  
+**  1 Redistributions of source code must retain the above copyright
+**    notice, this list of conditions and the following disclaimer.
+**  
+**  2 Redistributions in binary form must reproduce the above copyright
+**    notice, this list of conditions and the following disclaimer in
+**    the documentation and/or other materials provided with the
+**    distribution.
+**  
+**  3 Neither the name of the Standards Of Fundamental Astronomy Board,
+**    the International Astronomical Union nor the names of its
+**    contributors may be used to endorse or promote products derived
+**    from this software without specific prior written permission.
+**  
+**  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+**  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+**  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+**  FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+**  COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+**  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+**  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+**  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+**  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+**  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+**  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+**  POSSIBILITY OF SUCH DAMAGE.
+**  
+*/