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-Abstract

   MTK_DD_TO_RAD converts decimal degrees to radians.

-Copyright

   Copyright (2005), California Institute of Technology.
   U.S. Government sponsorship acknowledged.

-I/O
   
   Given:
   
      dd             decimal degrees

   the call:
   
      status = MTK_DD_TO_RAD( dd, rad )
   
   returns:
   
      status         0 on success; otherwise failure
      rad            radians

-Examples

      ;;
      ;; Set up input parameters
      ;;
      dd          = 65.55
      status      = MTK_DD_TO_RAD( dd, rad )
      
      ;;
      ;; Output...
      ;;
      print, 'decimal degrees       : ', dd
      print, '================================================='
      print, 'RADIANS               : ', rad

   IDL outputs:
   
      decimal degrees       : 65.5500
    =================================================
      RADIANS               :        1.1440634

-Particulars
   None.

-Required Reading
   For important details concerning this module's function, please refer to
   the MTK routine MtkDdToRad.c.

-Version
   -IDL-MTK Version 1.2.0