当弹道式再入飞行器的状态不确定时,防御弹道式再入飞行器的基本问题之一是制导拦截器问题。一般方法是先使用某种形式的卡尔曼滤波器估算再入飞行器的现时状态,然后预测它的作为时间函数的未来状态。如果知道再入飞行器的性能,就能够算出拦截器的发射时间和发射角,根据这些数据确定标称拦截点.一旦拦截器处于飞行中,由雷达测量结果,就 When the status of a ballistic reentry vehicle is uncertain, one of the basic problems in defense of a ballistic reentry vehicle is the guidance interceptor problem. The general approach is to use some form of Kalman filter to estimate the current state of the reentry vehicle and then to predict its future state as a function of time. Given the performance of the reentry vehicle, the launch time and launch angle of the interceptor can be calculated and the nominal intercept point determined from these data.Once the interceptor is in flight, the radar measurements,