2     1
     NAM     5    12    19    12     0
    GFSG     5    12    19    12     0
     1 FORWARD  ISOBARIC
     5    12    19    12   46.000  -68.000  2500.0
     1 PRESSURE
     1     1     5    12    19    12     0     0     0.0   46.000  -68.000   2500.0    715.7
     1     1     5    12    19    13     0     1     1.0   46.085  -67.305   2527.7    713.2
     1     1     5    12    19    14     0     2     2.0   46.181  -66.620   2524.6    712.1

....

     1     2     5    12    22    22     0    82    82.0   69.502  -17.574   2795.5    702.4
     1     2     5    12    22    23     0    83    83.0   69.683  -17.192   2796.2    702.4
     1     2     5    12    23     0     0    84    84.0   69.866  -16.833   2797.8    702.4