基于球坐标变换的双星编队伪距相对定位  

Pseudorange Positioning of Two Formation Flying Satellites Using Sphere Coordinate System

作　　者：杏建军[1] 郗晓宁[1] 王威[1] 韩龙[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2002年第4期16-19,共4页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目 ( 10 0 72 0 76 )

摘　　要：针对NASA的ST -3中自主编队飞行 (AFF)的双星星座 ,讨论利用星载的类GPS高精度的伪距观测数据确定星座之间相对位置和时间参数的问题。在常用的直角坐标系中建立系统的数学模型 ,并进行解算 ;特别针对双星编队定位解算几何结构弱、解算结果的协方差矩阵不稳定而无法进行传统协方差分析的问题 。This paper describes the research on the pseudorange positioning of Autonomous Formation Flyer (AFF) of two satellites using pseudolites onboard, which is proposed by the NASA's Space Technology (ST-3). We build model and resolve relative position and time bias between satellites using Cartesian coordinate. The solution error covariance is very grave and unstable because observation geometry is very weak. In order to resolve this problem, we change Cartesian coordinate into sphere coordinate. It can be found that in the sphere coordinate system the solution error covariance is stable and can be used for simulation/covariance analysis.

关 键 词：球坐标变换 相对定位 编队星座 伪距 星间相对测量 双星星座 卫星 数学模型 

分 类 号：V412[航空宇航科学与技术—航空宇航推进理论与工程] V448.2