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根据作战要求，建立了地空导弹制导雷达战备完好率的数学模型，并进行了分析。分析认为，制导雷达的战备完好率主要取决于系统的可靠性设计和功能检查的覆盖面；系统的故障检测率和修复率由设备的ＢＩＴＥ的检测率和在规定时间内故障的修复率来决定。
According to the operational requirements, a mathematic model of the readiness of surface-to-air missile guidance radar was established and analyzed. The analysis shows that the readiness of guidance radar is mainly determined by the coverage of reliability design and function check of the system. The detection rate and repair rate of the system are determined by the detection rate of BITE and the repair rate of failure within the specified time.