Reflection from Airy layer
P Z
3
0 1500 0 0 0 1 0
0 1500 -1600 0 0 1 0
10 1600  0 0 0 1 0
50 50 1 1
0 90 181 0
0 90 20 30
0 1 12 0.2
1400 1700 10 50
-10 20 10 10