J. POVEJSIL • P. WATERMAN 



CHAPTER 2 



THE DEVELOPMENT OF WEAPONS SYSTEM 

 REQUIREMENTS 



2-1 INTRODUCTION TO THE PROBLEM 



Assume that a radar design group is presented with the following 

 problem. 



Specify, design, and build the following radar systems for use in a fast attack 

 carrier task force environment in the time period Jgxy to I9^x. 



1. Airborne Intercept (AI) radar and fire-control system for all-weather 

 transonic interceptors, and 



2. Airborne Early Warning (AEW) radar system for installation in a 35,000 

 lb gross weight AEW aircraft. 



This chapter will demonstrate how the first part of this problem — 

 specification of radar requirements — can be solved using the general 

 approach outlined in Chapter 1. (Later chapters will discuss the additional 

 problems involved in mechanizing a radar system to meet a set of derived 

 requirements.) 



Although a specific problem is treated, the method of approach has 

 applicability to all radar specification problems. Particular emphasis is 

 placed on the processes of obtaining a good understanding of the overall 

 weapons system problem which dictates the radar requirements. 



Methods for formulating a system study plan and for constructing 

 system models are illustrated by examples. The type of information which 

 must be collected and analyzed by the radar design group prior to attempt- 

 ing the radar design also receives attention and comment. 



The hypothetical problem used as a vehicle for this discussion has been 

 greatly simplified; however, it is still a complicated problem and the reader 

 will be required to perform the same sort of rechecking, cross-referencing, 

 and backtracking that is required to understand and follow an actual 

 systems analysis problem. To facilitate this process, much of the reference 

 data is displayed on charts and diagrams which typify the pictorial 

 (iconic) representations that should be constructed for an actual systems 

 problem. 



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