Point source. Free space 
N 1 J T R
150 150 1 0.00
2
0 1500 0 0 0 1 0
0 1500 0 0 0 1 0

          3
   0.000000     0 0 1 0
   0.000000     0 0 2 120
   0.000000     0 0 4 120



0 0 0 1

-200 -0.2 0.0 180

1450 1e8 
-1 1 1 1

-200 -200 1
-0.2 -0.2 1
0 0 1

1450 1e8 
-1 1 1 1