Annual Report 2000 - WIT

44
The optimized radii of curvatures of the NIP waves are shown in Figure 8. For
comparison, in Figure 9, we have the optimized NIP wave radii of curvatures (cross
line) and the ray theoretical calculated values (dot line). We observe that in caustic
region the radius of curvature of the NIP wave is only poorly estimated. This last
result is due to the destructive interference of caustic events.
Time [s]
0.2
0.4
0.6
0.8
1
1.2
Distance [m]
1000 1500 2000 2500 3000 3500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
Figure 8: ô¤õ§ö©÷ section with the best estimated results of the CRS stack.
500
R NIP
[m]
400
300
200
100
5000
First reflector
1000 1500 2000 2500 3000 3500
Distance [m]
R NIP
[m]
4000
3000
2000
1000
0
Second reflector
1000 1500 2000 2500 3000 3500
Distance [m]
Figure 9: Comparison of ô¤õ§ö©÷ . Direct calculated values (dot line) and estimated
values (cross line). Top: First interface and bottom: second interface.