2-24] 



PROBABILITY OF VIEWING TARGET — VECTORING 



105 



Probability of 



Viewing 

 System Study 



iVIodel 

 (Vectoring Prob.) 



Defined by 

 Prior Study' 



P, (Achieved) 



P, = 0.95 



Assumed 



System 



Goal 



(Para. 



2.11) 



Fixed Elements 



Vectoring Method 



Vectoring Accuracy 



Assignment Doctrine 



Target Characteristics 



Target Aspect 



Interceptor Char. 



Pilot Characteristics 



Variable Elements 



Al Radar 

 Lock-On Range 

 Detection Range 

 Search Range 

 Look Angle 

 Display 



Search Doctrine 



Output of Study 



Fig. 2-27 Plan for the Study of Viewing (Vectoring) Probability. 



One of the fixed elements of the problem, target aspect, deserves some 

 discussion preparatory to the systems analysis. The target aspect or angle 

 off the target's nose at the beginning of vectoring is a function of the 

 geometry of the attack situation. Primary emphasis is placed on forward 

 hemisphere attacks; the first twenty interceptors are vectored into such 

 attacks on the twenty targets. The remaining interceptors are sent to 

 back up the first twenty. Some of these will be initially vectored to targets 

 that are destroyed by earlier interceptors. In such cases, the interceptor 

 will be assigned to a new target in order to utilize fully the total interceptor 

 fire power. These attacks may require the interceptor to approach the 

 target on the beam or from the rear hemisphere. In addition, some of the 

 forward hemisphere attacks will be aborted before missile launching because 

 of a failure to see the target or to make the proper conversion. In such cases, 

 the interceptor can turn around and employ its speed advantage to attack 

 one of the targets from the rear. These considerations indicate that all 

 initial angles off the target's nose must be considered. The interceptor kill 

 probability should be realized or exceeded for all possible approach angles; 

 i.e., the interceptor should have "around the clock" capability. 



Of paramount importance to both the vectoring and conversion phases is 

 the manner in which the fixed and variable problem elements combine to 

 produce distributions of possible aircraft headings at any point in space. 

 We may visualize this problem from Fig. 2-28. At any selected point (R,d) 

 relative to the target, the uncertainties of the vectoring system may cause 

 the heading of an interceptor passing through that point to assume any 

 value within the bounds shown. The spectrum of possible headings usually 



