2-26] AI RADAR REQUIREMENTS DICTATED BY VECTORING 



100 



o< 80 



LU UJ 



S"^ 60 

 cc < 



LlJ O 



!^ 40 

 o o 



113 



ii 20 



30 60 90 120 150 



ANGLE OFF TARGET'S NOSE, d (deg) 



180 



Fig. 2-34 



Maximum Look Angles Required for 95 Per Cent Probability of Seeing 

 Assigned Target with Collision Vectoring. 



an integrated display which allows the pilot to fly the aircraft in response 

 to the vectoring commands. 



During the last part of the vectoring phase, the pilot must detect and 

 acquire the target. The displays required for these functions must also be 

 integrated with the other vectoring displays to permit proper utilization of 

 the information. The considerations governing the design of a display 

 system to meet such requirements are treated in Chapter 12. This is one 

 of the most difficult design problems for any radar system; it is particularly 

 so for an AI radar because of the limited space and multiplicity of functions 

 the pilot must perform. Display integration, like reliability, is easier to 

 specify than to achieve. 



Search Volume Requirements. Radar search is accomplished by 

 scanning a prescribed volume of space as was shown in Chapter 1 (Fig. 1-1). 

 Target position uncertainty relative to the interceptor determines the 

 required dimensions of this volume. 



For a given lock-on range, the azimuth look-angle needed to accom- 

 modate 95 per cent of the expected tactical situations is shown in Fig. 2-34. 

 Since the search and acquisition procedures precede AI radar lock-on, it is 

 necessary to ascertain whether a target that is within the field of view at a 

 given range would also have been continuously within the field of view at 

 greater ranges. An inspection of Fig. 2-32 shows this to be the case. The 

 largest gimbal angles are required by the shortest ranges. Thus, only the 



