update ast 8.6.3

1 files changed, 202 insertions, 0 deletions

diff --git a/ast/erfa/apci13.c b/ast/erfa/apci13.c
new file mode 100644
index 0000000..c041652
--- /dev/null
+++ b/ast/erfa/apci13.c
@@ -0,0 +1,202 @@
+#include "erfa.h"
+
+void eraApci13(double date1, double date2,
+               eraASTROM *astrom, double *eo)
+/*
+**  - - - - - - - - - -
+**   e r a A p c i 1 3
+**  - - - - - - - - - -
+**
+**  For a terrestrial observer, prepare star-independent astrometry
+**  parameters for transformations between ICRS and geocentric CIRS
+**  coordinates.  The caller supplies the date, and ERFA models are used
+**  to predict the Earth ephemeris and CIP/CIO.
+**
+**  The parameters produced by this function are required in the
+**  parallax, light deflection, aberration, and bias-precession-nutation
+**  parts of the astrometric transformation chain.
+**
+**  Given:
+**     date1  double      TDB as a 2-part...
+**     date2  double      ...Julian Date (Note 1)
+**
+**  Returned:
+**     astrom eraASTROM*  star-independent astrometry parameters:
+**      pmt    double       PM time interval (SSB, Julian years)
+**      eb     double[3]    SSB to observer (vector, au)
+**      eh     double[3]    Sun to observer (unit vector)
+**      em     double       distance from Sun to observer (au)
+**      v      double[3]    barycentric observer velocity (vector, c)
+**      bm1    double       sqrt(1-|v|^2): reciprocal of Lorenz factor
+**      bpn    double[3][3] bias-precession-nutation matrix
+**      along  double       unchanged
+**      xpl    double       unchanged
+**      ypl    double       unchanged
+**      sphi   double       unchanged
+**      cphi   double       unchanged
+**      diurab double       unchanged
+**      eral   double       unchanged
+**      refa   double       unchanged
+**      refb   double       unchanged
+**     eo     double*     equation of the origins (ERA-GST)
+**
+**  Notes:
+**
+**  1) The TDB date date1+date2 is a Julian Date, apportioned in any
+**     convenient way between the two arguments.  For example,
+**     JD(TDB)=2450123.7 could be expressed in any of these ways, among
+**     others:
+**
+**            date1          date2
+**
+**         2450123.7           0.0       (JD method)
+**         2451545.0       -1421.3       (J2000 method)
+**         2400000.5       50123.2       (MJD method)
+**         2450123.5           0.2       (date & time method)
+**
+**     The JD method is the most natural and convenient to use in cases
+**     where the loss of several decimal digits of resolution is
+**     acceptable.  The J2000 method is best matched to the way the
+**     argument is handled internally and will deliver the optimum
+**     resolution.  The MJD method and the date & time methods are both
+**     good compromises between resolution and convenience.  For most
+**     applications of this function the choice will not be at all
+**     critical.
+**
+**     TT can be used instead of TDB without any significant impact on
+**     accuracy.
+**
+**  2) All the vectors are with respect to BCRS axes.
+**
+**  3) In cases where the caller wishes to supply his own Earth
+**     ephemeris and CIP/CIO, the function eraApci can be used instead
+**     of the present function.
+**
+**  4) This is one of several functions that inserts into the astrom
+**     structure star-independent parameters needed for the chain of
+**     astrometric transformations ICRS <-> GCRS <-> CIRS <-> observed.
+**
+**     The various functions support different classes of observer and
+**     portions of the transformation chain:
+**
+**          functions         observer        transformation
+**
+**       eraApcg eraApcg13    geocentric      ICRS <-> GCRS
+**       eraApci eraApci13    terrestrial     ICRS <-> CIRS
+**       eraApco eraApco13    terrestrial     ICRS <-> observed
+**       eraApcs eraApcs13    space           ICRS <-> GCRS
+**       eraAper eraAper13    terrestrial     update Earth rotation
+**       eraApio eraApio13    terrestrial     CIRS <-> observed
+**
+**     Those with names ending in "13" use contemporary ERFA models to
+**     compute the various ephemerides.  The others accept ephemerides
+**     supplied by the caller.
+**
+**     The transformation from ICRS to GCRS covers space motion,
+**     parallax, light deflection, and aberration.  From GCRS to CIRS
+**     comprises frame bias and precession-nutation.  From CIRS to
+**     observed takes account of Earth rotation, polar motion, diurnal
+**     aberration and parallax (unless subsumed into the ICRS <-> GCRS
+**     transformation), and atmospheric refraction.
+**
+**  5) The context structure astrom produced by this function is used by
+**     eraAtciq* and eraAticq*.
+**
+**  Called:
+**     eraEpv00     Earth position and velocity
+**     eraPnm06a    classical NPB matrix, IAU 2006/2000A
+**     eraBpn2xy    extract CIP X,Y coordinates from NPB matrix
+**     eraS06       the CIO locator s, given X,Y, IAU 2006
+**     eraApci      astrometry parameters, ICRS-CIRS
+**     eraEors      equation of the origins, given NPB matrix and s
+**
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  Derived, with permission, from the SOFA library.  See notes at end of file.
+*/
+{
+   double ehpv[2][3], ebpv[2][3], r[3][3], x, y, s;
+
+
+/* Earth barycentric & heliocentric position/velocity (au, au/d). */
+   (void) eraEpv00(date1, date2, ehpv, ebpv);
+
+/* Form the equinox based BPN matrix, IAU 2006/2000A. */
+   eraPnm06a(date1, date2, r);
+
+/* Extract CIP X,Y. */
+   eraBpn2xy(r, &x, &y);
+
+/* Obtain CIO locator s. */
+   s = eraS06(date1, date2, x, y);
+
+/* Compute the star-independent astrometry parameters. */
+   eraApci(date1, date2, ebpv, ehpv[0], x, y, s, astrom);
+
+/* Equation of the origins. */
+   *eo = eraEors(r, s);
+
+/* Finished. */
+
+}
+/*----------------------------------------------------------------------
+**  
+**  
+**  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.
+**  
+*/