Volume scat. Line source. . Goff-J. auto.
N s g O f 
500 0
3
128.    1500 0 0 0 1.024 0 0.0
128.    1600   0000.00  0.01  0.00  2.0  -2.0 10.0 2.5
228.00  1600   0000.00  0.01  0.00  2.0  0.0000 0.0 0 	

128	Where the interface scatterers start
78 128 51

700 1E8
4096 1 4096 0
4096 400 600 0.0004 0 1.0 2 NR time samples, freq start,end,time step, ranges...