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slalib/caf2r.f

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+      SUBROUTINE sla_CAF2R (IDEG, IAMIN, ASEC, RAD, J)
+*+
+*     - - - - - -
+*      C A F 2 R
+*     - - - - - -
+*
+*  Convert degrees, arcminutes, arcseconds to radians
+*  (single precision)
+*
+*  Given:
+*     IDEG        int       degrees
+*     IAMIN       int       arcminutes
+*     ASEC        real      arcseconds
+*
+*  Returned:
+*     RAD         real      angle in radians
+*     J           int       status:  0 = OK
+*                                    1 = IDEG outside range 0-359
+*                                    2 = IAMIN outside range 0-59
+*                                    3 = ASEC outside range 0-59.999...
+*
+*  Notes:
+*
+*  1)  The result is computed even if any of the range checks
+*      fail.
+*
+*  2)  The sign must be dealt with outside this routine.
+*
+*  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., 59 Temple Place, Suite 330, 
+*    Boston, MA  02111-1307  USA
+*
+*-
+
+      IMPLICIT NONE
+
+      INTEGER IDEG,IAMIN
+      REAL ASEC,RAD
+      INTEGER J
+
+*  Arc seconds to radians
+      REAL AS2R
+      PARAMETER (AS2R=0.484813681109535994E-5)
+
+
+
+*  Preset status
+      J=0
+
+*  Validate arcsec, arcmin, deg
+      IF (ASEC.LT.0.0.OR.ASEC.GE.60.0) J=3
+      IF (IAMIN.LT.0.OR.IAMIN.GT.59) J=2
+      IF (IDEG.LT.0.OR.IDEG.GT.359) J=1
+
+*  Compute angle
+      RAD=AS2R*(60.0*(60.0*REAL(IDEG)+REAL(IAMIN))+ASEC)
+
+      END