upgrade ast 8.7.1

1 files changed, 152 insertions, 0 deletions

diff --git a/ast/erfa/atic13.c b/ast/erfa/atic13.c
new file mode 100644
index 0000000..bd70ce5
--- /dev/null
+++ b/ast/erfa/atic13.c
@@ -0,0 +1,152 @@
+#include "erfa.h"
+
+void eraAtic13(double ri, double di, double date1, double date2,
+               double *rc, double *dc, double *eo)
+/*
+**  - - - - - - - - - -
+**   e r a A t i c 1 3
+**  - - - - - - - - - -
+**
+**  Transform star RA,Dec from geocentric CIRS to ICRS astrometric.
+**
+**  Given:
+**     ri,di  double  CIRS geocentric RA,Dec (radians)
+**     date1  double  TDB as a 2-part...
+**     date2  double  ...Julian Date (Note 1)
+**
+**  Returned:
+**     rc,dc  double  ICRS astrometric RA,Dec (radians)
+**     eo     double  equation of the origins (ERA-GST, Note 4)
+**
+**  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) Iterative techniques are used for the aberration and light
+**     deflection corrections so that the functions eraAtic13 (or
+**     eraAticq) and eraAtci13 (or eraAtciq) are accurate inverses;
+**     even at the edge of the Sun's disk the discrepancy is only about
+**     1 nanoarcsecond.
+**
+**  3) The available accuracy is better than 1 milliarcsecond, limited
+**     mainly by the precession-nutation model that is used, namely
+**     IAU 2000A/2006.  Very close to solar system bodies, additional
+**     errors of up to several milliarcseconds can occur because of
+**     unmodeled light deflection;  however, the Sun's contribution is
+**     taken into account, to first order.  The accuracy limitations of
+**     the ERFA function eraEpv00 (used to compute Earth position and
+**     velocity) can contribute aberration errors of up to
+**     5 microarcseconds.  Light deflection at the Sun's limb is
+**     uncertain at the 0.4 mas level.
+**
+**  4) Should the transformation to (equinox based) J2000.0 mean place
+**     be required rather than (CIO based) ICRS coordinates, subtract the
+**     equation of the origins from the returned right ascension:
+**     RA = RI - EO.  (The eraAnp function can then be applied, as
+**     required, to keep the result in the conventional 0-2pi range.)
+**
+**  Called:
+**     eraApci13    astrometry parameters, ICRS-CIRS, 2013
+**     eraAticq     quick CIRS to ICRS astrometric
+**
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  Derived, with permission, from the SOFA library.  See notes at end of file.
+*/
+{
+/* Star-independent astrometry parameters */
+   eraASTROM astrom;
+
+
+/* Star-independent astrometry parameters. */
+   eraApci13(date1, date2, &astrom, eo);
+
+/* CIRS to ICRS astrometric. */
+   eraAticq(ri, di, &astrom, rc, dc);
+
+/* 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.
+**  
+*/