dset ^pdef.dat
title MM5 data
options big_endian
undef -9999.
pdef  104   84 lcc   40.00  -10.00   52.50   42.50   30.00   60.00  -10.00  30000.  30000.
xdef  333 linear  -32.42   .1351
ydef  182 linear   27.29   .1351
zdef  20 levels  1000.00
  950.00
  925.00
  900.00
  850.00
  800.00
  750.00
  700.00
  650.00
  600.00
  550.00
  500.00
  450.00
  400.00
  350.00
  300.00
  250.00
  200.00
  150.00
  100.00
tdef   1 linear 12:00Z11SEP1996  360MN
vars  1
pslv     0 99 0 sea level prs (mb)  
endvars