dset ^data.grads
undef -999
title gfs.t00z.pgrb2f03
ydef 1 linear -90 0.5
xdef 1 linear 0 0.5
tdef 500 linear 05:35Z25MAY2012 3MN
zdef 1 linear 1000 5
vars 1   
load 1 99 load
ENDVARS