Point source in infinite medium
N I T c C J
50 0
2
0 1500 0 0 0 1 0
0 1500 0 0 0 1 0
0 
1 500 31 15
1200 1E8
1024 1 900
0 5 15 1
0 60 10 10
0 500 15 100
20 50 3