以攻防作战中的航天器组网与威胁分析为背景，对轨道上侦察卫星的星下点轨迹及其覆盖性能指标进行了计算，给出了侦察卫星的性能评估和威胁分析的方法，通过算例对卫星组网（即星座设计）进行了初步研究。 Taking the spacecraft network and threat analysis in the offensive and defensive operations as the background, the orbit point and the coverage performance index of the reconnaissance satellite in orbit are calculated, and the performance evaluation and threat analysis methods of the reconnaissance satellite are given. Example of the satellite network (that is, constellation design) conducted a preliminary study.