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.
出处
《电子设计工程》
2016年第2期21-24,共4页
Electronic Design Engineering
关键词
自主导航
GDOP
均匀采样
卫星星座
autonomous navigation
GDOP
uniform sampling
satellite constellation
