低轨预警卫星引导下的相控阵雷达搜索区域研究

摘要

In the process of ballistic missile defense, the key to carry out missile intercept is whether the phased array radar could capture the target rapidly under the guidance of early warning satellite. Some key problems are studied in this paper, aiming at the problem of search area definition of precision tracking radar under the guidance of low earth orbit (LEO) early warning satellite. Taking the space transportation system (STSS) of the USA as the study object, the detecting precision of multi-satellite is analyzed firstly, the CramérRao Bound of position error is taken to express detection precision of tracking satellite, and then the expression and transmission of measurement error under different coordinates system are discussed. Finally, the search area of phased array radar under pointing coordinate system is proposed and deduced when searching type of phased array radar is taking into account. The simulation results indicate that when the method is adopted, the search area of phased array radar is reduced, making radar searching more purposeful.%在弹道导弹防御过程中，相控阵雷达在预警卫星的引导下能否快速捕获并跟踪目标是开展拦截的关键。该文针对低轨预警卫星引导精密跟踪雷达搜索探测弹道导弹的搜索区域确定问题开展研究。以美国STSS低轨预警卫星为研究对象，首先分析了双星联合观测时的探测精度，提出以定位误差克拉美罗界作为跟踪卫星的定位精度，进而研究了测量误差在不同坐标系下的表达式及传递形式。最后，结合相控阵雷达搜索方式，提出并确定了相控阵雷达在指向坐标系下的搜索范围。仿真结果表明，采用该文的分析方法将有助于减小相控阵雷达搜索范围，提高雷达搜索针对性。