dset ^2010_1_31jan.dat
 undef 900000000000000.000000
 xdef   64  linear 0.000000  5.625
 ydef   36   linear -87.5  5.00000
zdef 10 levels 1.4 4.2 7.1 9.9 12.7 15.6 18.4 21.3 24.1 27.0   
*29.8 32.6 35.5 38.3 41.2 44.0 46.8 49.7 52.5 55.4 58.2 61.1  
*63.9 66.7 69.6 72.4 75.3 78.1 81.0 83.8 86.6 89.5 92.3 95.2 
*98.0 100.8 103.7 106.5 109.4 112.2 115.1 117.9 120.7 123.6 
*126.4 129.3 132.1 135.0
 tdef 248 linear 00:00Z1jan2006 3hrs
 vars 1
   dT 10 99 change T [K/24 hour]
 endvars