dset ^TOPO.MSM
title "MSM TOPOGRAPHY"
undef -999.9
options big_endian yrev
xdef 240 linear 120.0 0.125
ydef 252 linear  22.5 0.1
zdef 1 linear 1.0 1.0
tdef 1 linear 0Z2jan1987  1dy
vars 1
topo     0    1,  1,  0,  0 topography [m]
endvars