随着高超声速**技术的快速发展和实战化部署，美国有针对性地提出了建设**太空架构跟踪层计划的设想。首先，介绍了跟踪层卫星主要设计性能参数；其次，建立了跟踪层星座覆盖性能分析模型、探测能力分析模型和跟踪性能分析模型；最后，通过仿真计算对跟踪层系统性能进行了分析，并推断了系统全星座最小卫星数量、探测灵敏度和全球目标最优跟踪精度等核心能力。分析结果对相关系统信息处理算法研究、载荷与星座方案设计具有重要参考价值。

With the rapid development of technology and practical deployment of hypersonic weapon, the United States has carried out a new plan of building Tracking Layer of National Defense Space Architecture (NDSA). Firstly, the main design parameters of tracking layer were introduced; Secondly, the analysis model of tracking layer constellation coverage performance, detection capability and tracking performance were established; Finally, the performance of tracking layer was analyzed through simulation and calculation, and the core capabilities such as the minimum satellites number of the whole constellation, detection sensitivity and optimal global target tracking accuracy were deduced. The analysis results have important reference value for the research of data processing algorithm and the design of similar payload and constellation.