  print, 'SOM Y                 : ',somy

   IDL outputs:
   
      file name             : ../Mtk_testdata/in/MISR_AM1_GRP_ELLIPSOID_GM_P037_O029058_AA_F03_0024.hdf
      grid                  : GreenBand
      field                 : Green Radiance/RDQI
      start block           : 10
      end block             : 15
      line                  : 50.0
      sample                : 25.0
     =================================================
      SOM X                 : 8783500.0
      SOM Y              