unif tfile=mod1.par
unif <mod1.par >mod1.vel\
     nx=501 nz=501\
     dx=1 dz=1\
     fx=0.0 fz=0.0\
     ninf=5\
     x0=10,30,10 z0=10,20,10\
     method=mono\
     v00=2000.0,3000.0,4000.0,5000.0,6000.0 
ximage <mod1.vel n1=501 legend=2