.help dtf2d Jun99 "Slalib Package"
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      SUBROUTINE slDTFD (IHOUR, IMIN, SEC, DAYS, J)

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      D T F D
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  Convert hours, minutes, seconds to days (double precision)

  Given:
     IHOUR       int       hours
     IMIN        int       minutes
     SEC         dp        seconds

  Returned:
     DAYS        dp        interval in days
     J           int       status:  0 = OK
                                    1 = IHOUR outside range 0-23
                                    2 = IMIN outside range 0-59
                                    3 = SEC 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   July 1984

  Copyright (C) 1995 Rutherford Appleton Laboratory
  Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.

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