Parametres ==================
seisfile      =DATA/cosy4500_2
recfile       =DATA/test_rec
time          =4000.
nop           =2
stab          =.75
izfree        =4                           ! izfree >= nop/2+1
Model -----------------------
model_type    =2
vs0           =2000.
rho0          =2000.
Source ----------------------
sdepth        =100000.
aa            =0.
it0           =100
Receivers------------------------------
izrec         =4
JUNK------------------------------
icheck        =20
isnap         =0
iout          =4
iflush        =500
