基于半分析式方法的全球导航星座设计

导航星座设计涉及诸多参数的优化组合,设计目标就是寻找一组参数组合,使其构成的星座在指定覆盖区域既能获得最优的星座性能,又节省系统建设成本和星座长期维持费用。首先,提出评价导航星座性能的技术指标、可用性算法以及半分析式星座设计方法;然后,详细论证设计参数对导航星座性能的影响,进而综合分析得到3种全球导航星座设计方案;最后,通过对比研究3种星座方案的性能指标和导航定位仿真结果,说明导航星座设计方法和设计方案的可行性。

Global Navigation Constellation Design Based on Semi-analysis Method

The navigation constellation design is involved in the optimization issues of many(parameters).The goal of constellation design is to search a set of parameters and generate a(navigation) constellation using the ones.The constellation has not only the optimal performance,but also save the developing and maintaining cost of the satellite navigation system.Firstly,the(indexes) of evaluating constellation performance,algorithms of constellation availability and method of semi-analysis constellation design are presented as an important part.Secondly,the effects of the designed parameters on the constellation performance are analyzed and illustrated in detail,and(further) three global navigation constellation schemes given.Finally,by comparing and analyzing the performance indexes and positioning simulation results respectively based on three constellation schemes,it can be shown preliminarily that the semi-analysis method and constellation schemes are feasible.