一种基于射向约束的预警卫星弹道估计方法

天基预警系统是战略预警系统的重要组成部分,又分为双星探测与单星探测。传统单星探测方法基于标准弹道模板先验信息的支持,而标准弹道模板信息难以获取。针对预警卫星对弹道导弹进行弹道估计的问题,提出了一种基于射向约束的预警卫星对导弹弹道的估计模型。分别运用单星、双星探测弹道导弹的主动段数据对其弹道进行估计和预测并进行了定量计算。单星探测时,卫星位置与导弹平面夹角越小误差越大,当夹角达到5°以上,误差较小,基本可以满足远程预警雷达位置引导需求。双星探测时,预测误差进一步减少,精度进一步增加。上述仿真结果表明,该方法的弹道估计精度可为地基预警雷达提供足够的目标交接引导精度。

Method for estimating missile trajectory by early warning satellite based on direction constraint

The early warning of satellite is a necessary process and an important part of the early warning system, which is divided into double satellite detection and single satellite detection. The traditional single satellite detection method is based on the prior information of standard trajectory template, but the standard trajectory template information is difficult to obtain.In this paper, a missile trajectory estimation model by early warning satellite based on direction constraint is proposed aiming at the problem of trajectory estimation of ballistic missile by early warning satellite. The trajectory of ballistic missile is estimated and predicted by using the detection data of the missile boost phase of single satellite and double satellite detection respectively , and the quantitative calculation is carried out. During single satellite detection, the smaller the angle between the satellite position and the missile plane, the greater the error. When the angle reaches more than 5 °, the error is small, which can basically meet the position guidance requirements of long-range early warning radar. Double double star detection, The prediction error is further reduced and the accuracy is further increased during.The above simulation results show that the trajectory estimation accuracy of this method can provide enough target guidance accuracy for ground-based early warning radar.