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-Abstract

   MTK_FIELDATTR_GET returns the value of an attribute for a specified field/file.

-Copyright

   Copyright (2014), California Institute of Technology.
   U.S. Government sponsorship acknowledged.

-I/O
   
   Given:
   
      filename       MISR product file
      fieldname      name of a field within the file
      attrname       name of an attribute associated with the field

   the call:
   
      status = MTK_FIELDATTR_GET( filename, fieldname, attrname, attrval )
   
   returns:
   
      status         0 on success; otherwise failure
      attrval        value of specified field attribute

-Examples

      ;;
      ;; Set up input parameters
      ;;
      file        = '../Mtk_testdata/in/MISR_AM1_TC_CLOUD_P110_O074017_F01_0001.hdf'
      field       = 'CloudMotionCrossTrack'
      attr        = 'scale_factor'
      status      = MTK_FIELDATTR_GET( file, field, attr, val )
      
      ;;
      ;; Output...
      ;;
      print, 'file                  : ', file
      print, 'field                 : ', field
      print, 'attribute             : ', attr
      print, '================================================='
      print, 'attribute value       : ', val

   IDL outputs:
   
       file                  : ../Mtk_testdata/in/MISR_AM1_TC_CLOUD_P110_O074017_F01_0001.hdf
       field                 : CloudMotionCrossTrack
       attribute             : scale_factor
       =================================================
       attribute value       :     0.0100000

-Particulars
   None.

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

-Version
   -IDL-MTK Version 1.4.0