通过引入假想交点的概念，推导出了交点周期、基本交点距与轨道高度的关系。
Then, the relationship among nodal period, fundamental interval and orbital altitude was educed by deriving the definitions of fictitious node.
在分析编队构形一般设计方法设计效果的基础上，提出一种等交点周期法，对一般方法进行了改进。
On the basis of analyzing the effect of common configuration design method for the general method, the equal nodal period design method is introduced to improve the general method in this paper.
并给出了在轨道交点周期、回归圈数、回归周期、重复周期和其他因素等约束条件下的轨道设计要点。
The key points of the design under the restrained conditions, such as orbit node period, regressive cycles, regressive period, repeat period and others, were also presented.
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