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73 lines
2.1 KiB
Fortran
73 lines
2.1 KiB
Fortran
SUBROUTINE sla_DAF2R (IDEG, IAMIN, ASEC, RAD, J)
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*+
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* - - - - - -
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* D A F 2 R
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* - - - - - -
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*
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* Convert degrees, arcminutes, arcseconds to radians
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* (double precision)
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*
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* Given:
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* IDEG int degrees
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* IAMIN int arcminutes
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* ASEC dp arcseconds
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*
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* Returned:
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* RAD dp angle in radians
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* J int status: 0 = OK
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* 1 = IDEG outside range 0-359
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* 2 = IAMIN outside range 0-59
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* 3 = ASEC outside range 0-59.999...
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*
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* Notes:
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* 1) The result is computed even if any of the range checks
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* fail.
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* 2) The sign must be dealt with outside this routine.
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*
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* P.T.Wallace Starlink 23 August 1996
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*
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* Copyright (C) 1996 Rutherford Appleton Laboratory
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*
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* License:
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see SLA_CONDITIONS); if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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*-
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IMPLICIT NONE
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INTEGER IDEG,IAMIN
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DOUBLE PRECISION ASEC,RAD
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INTEGER J
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* Arc seconds to radians
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DOUBLE PRECISION AS2R
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PARAMETER (AS2R=0.484813681109535994D-5)
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* Preset status
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J=0
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* Validate arcsec, arcmin, deg
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IF (ASEC.LT.0D0.OR.ASEC.GE.60D0) J=3
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IF (IAMIN.LT.0.OR.IAMIN.GT.59) J=2
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IF (IDEG.LT.0.OR.IDEG.GT.359) J=1
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* Compute angle
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RAD=AS2R*(60D0*(60D0*DBLE(IDEG)+DBLE(IAMIN))+ASEC)
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END
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