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雷达系统的性能主要受被跟踪目标的电磁散射特性影响,其中一个关键目标参量是雷达散射截面(Radar cross section),定义为一个有效面积,即在雷达接收机方向散射的入射波功率。在雷声公司(Raytheon)所使用的两个目标模型探索法及他们的证实将于一介绍,方法之一是计算合成信号以及等效截面和来自若干分立散射点的闪烁,另一种方法即为统计模型,它是把滤波和来自一随机数目振荡器的标定噪声源相结合,以获得所需的结果。输出结果包括雷达散射截面采样图表,目标方位角函数和目标方位角速率函数对应的闪烁和角跟踪误差过程,也有两种方法的计算结果,以及与实际飞行数据所作的比较。
The performance of a radar system is mainly affected by the electromagnetic scattering characteristics of the target being tracked. One of the key target parameters is the Radar cross section, defined as an effective area, ie, the incident power scattered in the direction of the radar receiver. One of the two target model exploration methods and their demonstration used at Raytheon will be introduced. One of the methods is to calculate the composite signal and the equivalent cross section and flicker from several discrete scattering points, For the statistical model, it combines filtering with a calibrated noise source from a random number of oscillators to achieve the desired result. The output includes the scintillation and angular tracking error processes for the radar scatter profile sampling chart, the target azimuth function, and the target azimuth rate function. There are also two methods of calculation and comparison with actual flight data.