update ast 8.6.3

1 files changed, 172 insertions, 0 deletions

diff --git a/ast/erfa/pn00a.c b/ast/erfa/pn00a.c
new file mode 100644
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+++ b/ast/erfa/pn00a.c
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+#include "erfa.h"
+
+void eraPn00a(double date1, double date2,
+              double *dpsi, double *deps, double *epsa,
+              double rb[3][3], double rp[3][3], double rbp[3][3],
+              double rn[3][3], double rbpn[3][3])
+/*
+**  - - - - - - - - -
+**   e r a P n 0 0 a
+**  - - - - - - - - -
+**
+**  Precession-nutation, IAU 2000A model:  a multi-purpose function,
+**  supporting classical (equinox-based) use directly and CIO-based
+**  use indirectly.
+**
+**  Given:
+**     date1,date2  double          TT as a 2-part Julian Date (Note 1)
+**
+**  Returned:
+**     dpsi,deps    double          nutation (Note 2)
+**     epsa         double          mean obliquity (Note 3)
+**     rb           double[3][3]    frame bias matrix (Note 4)
+**     rp           double[3][3]    precession matrix (Note 5)
+**     rbp          double[3][3]    bias-precession matrix (Note 6)
+**     rn           double[3][3]    nutation matrix (Note 7)
+**     rbpn         double[3][3]    GCRS-to-true matrix (Notes 8,9)
+**
+**  Notes:
+**
+**  1)  The TT date date1+date2 is a Julian Date, apportioned in any
+**      convenient way between the two arguments.  For example,
+**      JD(TT)=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.
+**
+**  2)  The nutation components (luni-solar + planetary, IAU 2000A) in
+**      longitude and obliquity are in radians and with respect to the
+**      equinox and ecliptic of date.  Free core nutation is omitted;
+**      for the utmost accuracy, use the eraPn00  function, where the
+**      nutation components are caller-specified.  For faster but
+**      slightly less accurate results, use the eraPn00b function.
+**
+**  3)  The mean obliquity is consistent with the IAU 2000 precession.
+**
+**  4)  The matrix rb transforms vectors from GCRS to J2000.0 mean
+**      equator and equinox by applying frame bias.
+**
+**  5)  The matrix rp transforms vectors from J2000.0 mean equator and
+**      equinox to mean equator and equinox of date by applying
+**      precession.
+**
+**  6)  The matrix rbp transforms vectors from GCRS to mean equator and
+**      equinox of date by applying frame bias then precession.  It is
+**      the product rp x rb.
+**
+**  7)  The matrix rn transforms vectors from mean equator and equinox
+**      of date to true equator and equinox of date by applying the
+**      nutation (luni-solar + planetary).
+**
+**  8)  The matrix rbpn transforms vectors from GCRS to true equator and
+**      equinox of date.  It is the product rn x rbp, applying frame
+**      bias, precession and nutation in that order.
+**
+**  9)  The X,Y,Z coordinates of the IAU 2000A Celestial Intermediate
+**      Pole are elements (3,1-3) of the GCRS-to-true matrix,
+**      i.e. rbpn[2][0-2].
+**
+**  10) It is permissible to re-use the same array in the returned
+**      arguments.  The arrays are filled in the order given.
+**
+**  Called:
+**     eraNut00a    nutation, IAU 2000A
+**     eraPn00      bias/precession/nutation results, IAU 2000
+**
+**  Reference:
+**
+**     Capitaine, N., Chapront, J., Lambert, S. and Wallace, P.,
+**     "Expressions for the Celestial Intermediate Pole and Celestial
+**     Ephemeris Origin consistent with the IAU 2000A precession-
+**     nutation model", Astron.Astrophys. 400, 1145-1154 (2003)
+**
+**     n.b. The celestial ephemeris origin (CEO) was renamed "celestial
+**          intermediate origin" (CIO) by IAU 2006 Resolution 2.
+**
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  Derived, with permission, from the SOFA library.  See notes at end of file.
+*/
+{
+/* Nutation. */
+   eraNut00a(date1, date2, dpsi, deps);
+
+/* Remaining results. */
+   eraPn00(date1, date2, *dpsi, *deps, epsa, rb, rp, rbp, rn, rbpn);
+
+   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.
+**  
+*/