NAME:
       STRINGAD
 PURPOSE:
       Converts a string of sexigesimal coordinates into decimal degrees.
 CALLING SEQUENCE:
       STRINGAD, COORDS, RA, DEC
 INPUT:
       COORDS    A string of coordinates (e.g. '17 00 45.2 25 4 32.4')
               It should have six numbers delimited by spaces or colons
 OUTPUT:
       RA        Right Ascension, decimal degrees, scalar
       DEC       Declination, decimal degrees, scalar
 PROCEDURES CALLED:
       Getopt   Ten
 HISTORY:
       09-AUG-90 Version 1 written by Kerry McQuade
       20-AUG-90 Put code to account for '-0' back in after it was
               removed by someone.  E. Deutsch
       17-JUL-95 Added support for coordinates separated by colons, e.g.
               17:00:45.2 25:4:32.4, which IRAF uses.  E. Deutsch

(See /home/xmmssc/soft/idl/pro/astro/stringad.pro)