基于鸿雁单颗LEO卫星和GEO卫星的天基导航备份  

Space-based Navigation Backup with Single Hongyan LEO Satellite and GEO Satellites

作　　者：雷文英[1] 李毅松[1] 周昀[1] 严涛[1] 边朗[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2017年第5期47-51,共5页Space Electronic Technology

摘　　要：研究基于鸿雁单颗LEO卫星和GEO轨道卫星资源实现天基卫星导航备份问题,提出了基于单颗LEO和3颗GEO卫星和基于单颗LEO和2颗GEO卫星构成的导航备份方案,分别建立了两种系统模型,给出了相应的定位授时体制,并通过数值计算仿真,分析了波束覆盖区域内的GDOP和覆盖性、定位授时的统计分布和不同测距误差下的定位授时精度。分析结果表明,所提出的两种导航备份方案有效可行。The space-based navigation backup issue exploiting a single LEO Hongyan satellite and several GEO satellites is addressed in the paper. Two navigation backup systems with different architectures are proposed compared using the corresponding scenarios modeled with STK. Combined with numerical experiment results of the two built system models. The correctness and effectiveness of the two navigation backup systems are analyzed and verified from three aspects,which involve GDOP distribution and coverage,positioning error distribution,timing error distribution,positioning and timing performance under different ranging errors.

关 键 词：鸿雁系统 LEO 天基导航备份 定位 授时 

分 类 号：V474[航空宇航科学与技术—飞行器设计]