Patent ID: 6064331
Filing Date: 2000-05-16
Classification: G01S

Abstract:
A process for radar tracking of a target comprising the steps of:a. retrieving an estimate of a target range and a range uncertainty swath from a first radar system;b. inputting the estimate of the target range, the range uncertainty swath, and a duty factor into a second radar system;c. instructing the second radar system to determine a set of zero eclipse intervals, and respective ranges of range pulse repetition frequencies, which solve equations (1)-(3):Frh=(c/2)*(n+1-df)/(Rcue+dR) (1)Frl=(c/2)*(n+df)/(Rcue+dR) (2)Frh.gtoreq.Fr.sub.RANGE .gtoreq.Frl (3)wherein:n=zero eclipse interval;Frh=highest range pulse repetition frequency for n;Frl=lowest range pulse repetition frequency for n;c=speed of light;df=desired duty factor;Rcue=estimate of target range;dR=half of the range uncertainty swath; andFr.sub.RANGE =range of range pulse repetition frequencies for n;d. choosing a particular range pulse repetition frequency from the ranges of range pulse repetition frequencies determined in step c from the set of zero eclipse intervals; ande. instructing the second radar system to track the target using the chosen range pulse repetition frequency.