北斗卫星导航(区域)系统星座对中国载人航天器的服务能力仿真分析

Simulation and Analysis on Service Ability of BeiDou Navigation Satellite( regional) System Constellation for China's Manned Spacecrafts

载人航天器可以利用北斗卫星导航系统实现自主导航定位和相对测量以支持轨道确定和交会对接任务。为了评估当前星座条件下北斗卫星导航(区域)系统对中国载人航天器的服务能力,建立了当前北斗卫星导航(区域)系统的星座仿真场景。利用载人航天器轨道参数,对其轨道处北斗区域星座的覆盖特性和服务能力进行了仿真,分析了可以用于载人航天器绝对定位和相对定位的时间长度、可见卫星情况、位置精度因子等特性。分析结果表明,在载人航天轨道的一些持续时间段内,航天器可以利用北斗(区域)系统完成绝对和相对定位功能。

Manned spacecrafts can utilize BeiDou Navigation Satellite System to accomplish autono-mous navigation and relative measurement to support orbit determination and rendezvous and docking missions.To evaluate the service ability of BeiDou Navigation Satellite （regional） System for Chi-na’s manned spacecrafts based on the current constellation , a software simulation scenario was set-up .The service ability of BeiDou constellation over manned spacecraft orbit including time lengths of absolute positioning and relative navigation , satellites in view and position dilutions of precision were obtained and analyzed from the simulation .The analysis results demonstrated that the current BeiD-ou Navigation Satellite （ regional ） System can provide absolute and relative navigation services for manned space orbit during some continuous periods of time .