The cumulative detection probability for a search radar is a function of tar-'get approach angle as well as other radar and target parameters. Earlier studies have dealt with radially approaching tar¬gets; this one deals with nonradial tar¬get approach angles. From the curves in this Memorandum, optimum scan rates and the relationship between cumulative de¬tection probability and normalized range can be determined. Both nonfluctuating and fluctuating target cases (Swerling I Cases I and III) are considered. The 1 Fortran program for these calculations is | included and can be used to compute cumulative detection probabilities for other target approach angles and scan rates.
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