DESERT SEARCHES: THE EFFECTIVENESS OF HELICOPTERS
Table 4 may be used to determine the range of values for the cumulative POD obtained by searching an area multiple times with a helicopter in cloudy, subdued light conditions. In this table, the column on the left is the number of times the area is searched; the row across the top is the confidence level required. Each square in the body of the table contains two numbers: the cumulative POD corresponding to the smallest and largest interval values for the single pass POD given in Table 1 or Table 2.
TABLE 4
Multiple Pass POD for CLOUDY, SUBDUED LIGHT CONDITIONS
Confidence Level
|
|
0.400 |
0.500 |
0.600 |
0.700 |
0.750 |
0.800 |
0.850 |
0.900 |
0.950 |
0.990 |
0.999 |
Passes |
|
|
|
|
|
|
|
|
|
|
|
1 |
0.590 |
0.572 |
0.551 |
0.527 |
0.513 |
0.496 |
0.477 |
0.452 |
0.413 |
0.342 |
0.265 |
|
0.770 |
0.785 |
0.801 |
0.818 |
0.828 |
0.839 |
0.852 |
0.868 |
0.890 |
0.925 |
0.956 |
|
|
|
|
|
|
|
|
|
|
|
|
2 |
0.832 |
0.817 |
0.798 |
0.776 |
0.763 |
0.746 |
0.726 |
0.700 |
0.655 |
0.567 |
0.460 |
|
0.947 |
0.954 |
0.960 |
0.967 |
0.970 |
0.974 |
0.978 |
0.983 |
0.988 |
0.994 |
0.998 |
|
|
|
|
|
|
|
|
|
|
|
|
3 |
0.931 |
0.922 |
0.909 |
0.894 |
0.884 |
0.872 |
0.857 |
0.835 |
0.798 |
0.715 |
0.603 |
|
0.988 |
0.990 |
0.992 |
0.994 |
0.995 |
0.996 |
0.997 |
0.998 |
0.999 |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
4 |
0.972 |
0.966 |
0.959 |
0.950 |
0.944 |
0.935 |
0.925 |
0.910 |
0.881 |
0.813 |
0.708 |
|
0.997 |
0.998 |
0.998 |
0.999 |
0.999 |
0.999 |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
5 |
0.988 |
0.986 |
0.982 |
0.976 |
0.973 |
0.967 |
0.961 |
0.951 |
0.930 |
0.877 |
0.785 |
|
0.999 |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
6 |
0.995 |
0.994 |
0.992 |
0.989 |
0.987 |
0.984 |
0.980 |
0.973 |
0.959 |
0.919 |
0.842 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
7 |
0.998 |
0.997 |
0.996 |
0.995 |
0.994 |
0.992 |
0.989 |
0.985 |
0.976 |
0.947 |
0.884 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
8 |
0.999 |
0.999 |
0.998 |
0.997 |
0.997 |
0.996 |
0.994 |
0.992 |
0.986 |
0.965 |
0.915 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
9 |
+.+++ |
+.+++ |
0.999 |
0.999 |
0.998 |
0.998 |
0.997 |
0.996 |
0.992 |
0.977 |
0.937 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
10 |
+.+++ |
+.+++ |
+.+++ |
0.999 |
0.999 |
0.999 |
0.998 |
0.998 |
0.995 |
0.985 |
0.954 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
11 |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
0.999 |
0.999 |
0.999 |
0.997 |
0.990 |
0.966 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
12 |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
0.999 |
0.998 |
0.993 |
0.975 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
13 |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
0.999 |
0.996 |
0.982 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
14 |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
0.999 |
0.997 |
0.987 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
|
|
|
|
|
|
|
|
|
|
|
15 |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
0.998 |
0.990 |
|
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
+.+++ |
|
+.+++ denotes a number greater than 0.999 and less than
+.+++.
|
|