天基光学短弧初轨的约束微分修正方法  

Constrained Differential Correction in Initial Orbit Determination with Short Arcs in Optical Space-based Space Surveillance

作　　者：李骏[1] 安玮[1] 周一宇[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《宇航学报》2009年第2期769-774,共6页Journal of Astronautics

摘　　要：为解决天基光学短弧测量条件下的空间目标初轨确定问题,在对天基光学空间目标监视数据特点进行分析的基础上,引入弧段测量约束域概念和域内三角剖分方法,提出基于剖分节点优选的约束微分修正方法,利用两个短弧测量实现对新发现目标的初轨确定。该方法可充分利用弧段测量信息对目标进行有效约束,并由剖分节点优选提供较好的初始条件,可增强迭代收敛性和稳定性。最后结合仿真结果对方法误差特性和域内收敛特性进行探讨。Based on the analysis on the characteristic of the data of the space-based optical surveillance, the concept of the Admissible Region and the idea of the triangulation were introduced to solve the problem of the initial orbit determination with short arcs. The constrained differential correction method was put forward based on the selected optimal triangulation nodes. Two short arcs were used to determine the initial orbit of the uncataloged target. Measurements information of the arc provide effective restriction on the object and the selected nodes provide the better initial condition, so the convergency and stability of iterative procedure can be enhanced. And the characteristics of the error and the convergency in Admissible Region were discussed according to the analysis on the simulation results.

关 键 词：天基监视 光学 初轨确定 微分修正 

分 类 号：TN971.4[电子电信—信号与信息处理] V412.4[电子电信—信息与通信工程]