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+ SUBROUTINE slPRBN (BEP0, BEP1, RMATP)
+*+
+* - - - - - -
+* P R B N
+* - - - - - -
+*
+* Generate the matrix of precession between two epochs,
+* using the old, pre-IAU1976, Bessel-Newcomb model, using
+* Kinoshita's formulation (double precision)
+*
+* Given:
+* BEP0 dp beginning Besselian epoch
+* BEP1 dp ending Besselian epoch
+*
+* Returned:
+* RMATP dp(3,3) precession matrix
+*
+* The matrix is in the sense V(BEP1) = RMATP * V(BEP0)
+*
+* Reference:
+* Kinoshita, H. (1975) 'Formulas for precession', SAO Special
+* Report No. 364, Smithsonian Institution Astrophysical
+* Observatory, Cambridge, Massachusetts.
+*
+* Called: slDEUL
+*
+* P.T.Wallace Starlink 23 August 1996
+*
+* Copyright (C) 1996 Rutherford Appleton Laboratory
+*
+* License:
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program (see SLA_CONDITIONS); if not, write to the
+* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+* Boston, MA 02110-1301 USA
+*
+* Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
+*-
+
+ IMPLICIT NONE
+
+ DOUBLE PRECISION BEP0,BEP1,RMATP(3,3)
+
+* Arc seconds to radians
+ DOUBLE PRECISION AS2R
+ PARAMETER (AS2R=0.484813681109535994D-5)
+
+ DOUBLE PRECISION BIGT,T,TAS2R,W,ZETA,Z,THETA
+
+
+
+* Interval between basic epoch B1850.0 and beginning epoch in TC
+ BIGT = (BEP0-1850D0)/100D0
+
+* Interval over which precession required, in tropical centuries
+ T = (BEP1-BEP0)/100D0
+
+* Euler angles
+ TAS2R = T*AS2R
+ W = 2303.5548D0+(1.39720D0+0.000059D0*BIGT)*BIGT
+
+ ZETA = (W+(0.30242D0-0.000269D0*BIGT+0.017996D0*T)*T)*TAS2R
+ Z = (W+(1.09478D0+0.000387D0*BIGT+0.018324D0*T)*T)*TAS2R
+ THETA = (2005.1125D0+(-0.85294D0-0.000365D0*BIGT)*BIGT+
+ : (-0.42647D0-0.000365D0*BIGT-0.041802D0*T)*T)*TAS2R
+
+* Rotation matrix
+ CALL slDEUL('ZYZ',-ZETA,THETA,-Z,RMATP)
+
+ END