GPS+BDS组合的实时定轨技术

被引:8
作者
姜洋 [1 ]
张和芬 [1 ]
汪精华 [1 ]
于龙江 [1 ]
张国斌 [1 ]
李化义 [2 ]
机构
[1] 北京空间飞行器总体设计部
[2] 哈尔滨工业大学卫星技术研究所
基金
黑龙江省自然科学基金;
关键词
实时定轨; GPS; BDS; 加权最小二乘法;
D O I
10.16356/j.1005-2615.2015.06.008
中图分类号
V448.2 [航天器制导与控制]; V412.41 [];
学科分类号
081105 ; 08 ; 0825 ;
摘要
为了改善卫星几何分布,提高低轨(Low earth orbit,LEO)卫星实时定轨的精度与可靠性,提出了北斗卫星导航系统(Beidou navigation satellite system,BDS)与全球定位导航系统(Global positioning system,GPS)组合模型。组合模型基于加权最小二乘法(Weighted least square,WLS),利用伪距观测量建立观测模型,实时估计LEO卫星位置。目前,LEO卫星尚未装备星载BDS+GPS双模接收机,为验证算法可行性,利用GPS/BDS卫星星历文件与STK软件仿真生成实验数据。实验结果表明,BDS+GPS组合模型较GPS系统模型精度至少提高26%。
引用
收藏
页码:842 / 847
页数:6
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