Then, the relationship among nodalperiod, fundamental interval and orbital altitude was educed by deriving the definitions of fictitious node.
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。
2
On the basis of analyzing the effect of common configuration design method for the general method, the equal nodalperiod design method is introduced to improve the general method in this paper.