halfspace. Vs=100m/s
N d
100 0 4 100 0
2
0 0 0 0 0 0 0
0 1500 0 0 0 1 0
100
10 190 10
1400 1e8
-1 1 1 0
1024 50 150 0.0005 0.2 0.2 2