ANG_DIFF Name
      
       ANG_DIFF Purpose
      
       Return difference between two angles in degress.
Category
Calling Sequence
      
       d = ang_diff(a1,a2) Inputs
             a1, a2 = Input angles in degrees.    in
Keyword Parameters
Outputs
      
       d = returned difference in degress.  out
Common Blocks
Notes
      
       Notes: deals with 0/360 deg discontinuity.
Modification History
      
       R. Sterner, 2006 Nov 07 
  
 Copyright (C) 2006, 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.