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First, let's look at the factors that affect the probability of survival of a defender's missile site. The probability of survival (Ps) can be expressed as follows:
(Ps) = 0.5 exp [n(Rw/C)2]
where "exp" means that the entire bracketed expression is the exponent of 0.5;
n
= the "programming ratio" -- the number of attacking weapons;
Rw
= weapons radius -- the number of feet out from ground zero that the
overpressure required to destroy the target will be experienced;
C
= Circular Probable Error (CEP), in feet.
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