1.0 



0.8 



0.6 



Q 



a. 



^ 0.4 



0.2 





N, = l 







2 



3 













f 





r 





/ - 





i 





































Figure 5. An approximation to the probability of detecting a constant-range 

 target when the mean number of scans across the target is 4/A/; an indication 

 of how the cumulative detection probability would vary with N. The values of 

 Pq used are those plotted in figure 4. 



19 



