dset ^hgt500.nov-apr_le.bin
undef -999.9
options little_endian
title test
xdef   144 linear   0  2.500
ydef   37 linear  0 2.5000
zdef 1 linear  1 1
tdef 30 linear 01jan1981 1yr
vars 1
hgt    0 0 Average Nov-Apr geopotential height at 500-mb (m)
ENDVARS