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      Convert distances in selected units to meters.


Calling Sequence

      dm = to_meters(d)


      d = Distance in some units. in

Keyword Parameters


        UNITS=units Units for d.
          Case ignored, only first 2 letters used.
          Known units are:
            nmiles = Nautical miles
            miles = Statute miles
            kms = Kilometers
            meters (or m) = Meters
            yards = Yards
            feet (or foot) = Feet
        keyword will over-ride embedded units.


      dm = returned distance in meters. out

Common Blocks


      Notes: Units may be included after distance value
        instead of in UNITS if d is a string. The UNITS

Modification History

      R. Sterner, 2007 Dec 07
      R. Sterner, 2008 Feb 04 --- Added UNITS keyword.
      R. Sterner, 2010 Aug 13 --- Made floating for m or meters.
      R. Sterner, 2011 Jul 11 --- Improved message if no units given.
      R. Sterner, 2013 Feb 13 --- Allowed arrays.
  Copyright (C) 2007, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.

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