中文摘要：

提出一种基于SRIF滤波器的小天体探测器绕飞轨道及目标天体参数确定方法.考虑绕飞小天体初期待估参数多、动力学环境复杂等特点,利用SRIF滤波器对组合导航数据进行处理,对探测器绕飞轨道以及目标天体引力场模型、自旋状态、星历信息等动力学参数进行估计.利用Eros433的观测数据进行数学仿真表明,本文给出的方法能够有效地计算绕飞轨道和确定目标天体的物理参数.

英文摘要：

The around orbit parameters and small body physical parameters determination methods are studied based on Square Root Information Filter（SRIF）.Due to a great deal of parameters to be estimated and the complexity of the dynamics,the SRIF is designed to process the integrated navigation data and estimate the gravity field,rotation,and ephemeris of small body and orbit parameters of probe.The mathematic simulation experiments using the measuring data of Eros433 small body have validated the algorithm.