中文摘要：

利用两个短弧段的天基测角资料实现对GEO空间目标的轨道确定是天基空间目标监视系统需解决的重要问题之一。将短弧段的主要测量信息表示为弧段属性,构造约束空间目标距离和径向速度的容许域,采用桁架平衡法对第一个短弧段的容许域三角剖分采样,以这些采样点的轨道预报第二个短弧段的弧段属性,通过分析预报值与实际值的差异,优先选取多个采样点的轨道作为初轨,分别对各初轨进行轨道改进。仿真结果表明,该方法能成功解算最小二乘轨道。

英文摘要：

Orbit determination for GEO objects using two short arcs from space-based optical observations plays a key role in the space-based space surveillance systems.The significant information of a short arc was represented by an attributable including two angles and their time derivatives at the mean time.The admissible region was constructed to constrain the distance and the radial velocity between the surveillance satellite and the GEO object.Using the force equilibrium of a truss structure,the admissible region of the first arc was sampled by triangulation.The orbits of these samples were propagated to predict the attribute of the second arc.By comparing the predicted attribute with the actual one,several proper preliminary orbits were determined for orbit improvement.The simulation results show that our method can successfully achieve the least square solution and indicate the excellent convergence behavior.