弹道导弹自身没有探测设备，无法获取拦截器的状态信息，不利于规避拦截。为解决导弹对拦截器的定位问题，提出基于天基跟踪与监视系统单星红外探测，辅助导弹自身导航信息对拦截器的定位算法。红外探测器探测到拦截器时，拦截器在测量视线上，拦截器采用逆轨拦截方法，也在导弹的弹道平面内，探测视线与弹道平面的交点就是大气层外动能拦截器(EKV)的位置。论证了星载红外探测器对拦截器的可探测性，阐述了定位算法的实现步骤，对导弹对抗时运用该算法对拦截器定位进行数值仿真，分析了定位误差及其成因。仿真结果表明，该算法可实现导弹对拦截器的定位。

It is a disadvantage for ballistic missile to escape interceptor having no detector to get information of interceptor. To resolve this problem, the algorithm to locate interceptor by the detection of space tracking and surveillance system (STSS) single infrared detector with the support of missile navigation information is proposed. If interceptor is captured by IR detector, it must locate in the line of sight from detector to interceptor. During the head-on interception, exoatmospheric kill vehicle (EKV) locates in the ballistic plane of penetration missile. The intersection point of detector measurement sight line and penetration missile′s ballistic plane is the position of interceptor. The feasibility that STSS infrared sensor can detect the EKV is demonstrated. Then the algorithm implement approach is expatiated and the numeral simulation of the localization algorithm is carried out. Finally, the localization error and its reasons are analyzed. It is indicated that the algorithm can provide a method for missile to locate the position of interceptor.