update ast 8.6.2

1 files changed, 111 insertions, 0 deletions

diff --git a/ast/pal/palPrenut.c b/ast/pal/palPrenut.c
new file mode 100644
index 0000000..04e36f3
--- /dev/null
+++ b/ast/pal/palPrenut.c
@@ -0,0 +1,111 @@
+/*
+*+
+*  Name:
+*     palPrenut
+
+*  Purpose:
+*     Form the matrix of bias-precession-nutation (IAU 2006/2000A)
+
+*  Language:
+*     Starlink ANSI C
+
+*  Type of Module:
+*     Library routine
+
+*  Invocation:
+*     void palPrenut( double epoch, double date, double rmatpn[3][3] )
+
+*  Arguments:
+*     epoch = double (Returned)
+*        Julian epoch for mean coordinates.
+*     date = double (Returned)
+*        Modified Julian Date (JD-2400000.5) for true coordinates.
+*     rmatpn = double[3][3] (Returned)
+*        combined NPB matrix
+
+*  Description:
+*     Form the matrix of bias-precession-nutation (IAU 2006/2000A).
+*     The epoch and date are TT (but TDB is usually close enough).
+*     The matrix is in the sense   v(true)  =  rmatpn * v(mean).
+
+*  Authors:
+*     PTW: Pat Wallace (STFC)
+*     {enter_new_authors_here}
+
+*  History:
+*     2012-02-10 (PTW):
+*        Initial version.
+*        Adapted with permission from the Fortran SLALIB library.
+*     {enter_further_changes_here}
+
+*  Copyright:
+*     Copyright (C) 2012 Science and Technology Facilities Council.
+*     All Rights Reserved.
+
+*  Licence:
+*     This program is free software: you can redistribute it and/or
+*     modify it under the terms of the GNU Lesser General Public
+*     License as published by the Free Software Foundation, either
+*     version 3 of the License, or (at your option) any later
+*     version.
+*
+*     This program is distributed in the hope that it will be useful,
+*     but WITHOUT ANY WARRANTY; without even the implied warranty of
+*     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*     GNU Lesser General Public License for more details.
+*
+*     You should have received a copy of the GNU Lesser General
+*     License along with this program.  If not, see
+*     <http://www.gnu.org/licenses/>.
+
+*  Bugs:
+*     {note_any_bugs_here}
+*-
+*/
+
+#include "pal.h"
+#include "palmac.h"
+#include "pal1sofa.h"
+
+void palPrenut ( double epoch, double date, double rmatpn[3][3] ){
+
+/* Local Variables: */
+   double bpa;
+   double bpia;
+   double bqa;
+   double chia;
+   double d1;
+   double d2;
+   double eps0;
+   double epsa;
+   double gam;
+   double oma;
+   double pa;
+   double phi;
+   double pia;
+   double psi;
+   double psia;
+   double r1[3][3];
+   double r2[3][3];
+   double thetaa;
+   double za;
+   double zetaa;
+
+/* Specified Julian epoch as a 2-part JD. */
+   eraEpj2jd( epoch, &d1, &d2 );
+
+/* P matrix, from specified epoch to J2000.0. */
+   eraP06e( d1, d2, &eps0, &psia, &oma, &bpa, &bqa, &pia, &bpia, &epsa,
+            &chia, &za, &zetaa, &thetaa, &pa, &gam, &phi, &psi );
+   eraIr( r1 );
+   eraRz( -chia, r1 );
+   eraRx( oma, r1 );
+   eraRz( psia, r1 );
+   eraRx( -eps0, r1 );
+
+/* NPB matrix, from J2000.0 to date. */
+   eraPnm06a( PAL__MJD0, date, r2 );
+
+/* NPB matrix, from specified epoch to date. */
+   eraRxr( r2, r1, rmatpn );
+}