基于GPS/GLONASS星座卫星的星间GDOP最小值分析  

Analysis of GDOP minimum value for autonomous navigation based on GPS/GLONASS constellation

作　　者：肖寅[1,2] 姜兴龙[3,2] 龚文斌[2] 沈学民[1,2] 

机构地区：[1]上海技术物理研究所,上海200083 [2]上海微小卫星工程中心,上海201203 [3]上海微系统与信息技术研究所,上海200050

出　　处：《电子设计工程》2016年第2期21-24,共4页Electronic Design Engineering

摘　　要：卫星自主定轨时选择测量卫星的几何构型对于定轨精度有着重要的影响,其影响程度由GDOP(几何衰减因子)来决定。GDOP值的下限限制了在一定的测量精度下的自主定轨精度。通过分别构建GPS星座和GLONASS星座并分析其构型特征,确定了接收机GDOP取理论最小值时的边界条件,利用均匀采样法分别得到GDOP的理论最小值,同时进一步用仿真数据验证了两者理论值的正确性。Geometry of measuring satellites has important implications for precision of the autonomous orbit determination.Currently, the affecting of the geometry for terrestrial receiver and a navigation satellites on the positioning precision is mainly measured by the GDOP. The lower limit of GDOP limits the measurement accuracy of a positioning accuracy range of the user.Constructing navigation constellation of GPS and GLONASS determines the boundaries for taking the minimum value of GDOP of the terrestrial receiver. Using uniform sampling get the minimum GDOP. Simultaneously, the simulation data verified the correctness of the minimum GDOP.

关 键 词：自主导航 GDOP 均匀采样 卫星星座 

分 类 号：TN961[电子电信—信号与信息处理]