-L.... , . . . . . . . 0°.
~. "
0°
ALUMINUM
45°
STEEL
45°
CORAL ROCK
0°
45°
w
':f
~
~
r
~
90°
I
500llS
t··· -- ' ,' ."
I
I
o
500llS
90°
I
250llS
FIGURE 9.19. Echoes from the aluminum, steel, and coral rock targets at different aspect angles. (From Au and Turl
1991:).