一种适用于相机阵列的空间目标初轨确定方法

Method Suitable for Initial Orbit Determination of Space Targets Using Camera Array

结合单位矢量法的优点,提出一种适用于相机阵列的空间目标初轨确定(IOD)方法,并给出新的条件方程和具体流程。使用实验室搭建的相机阵列系统对某空间目标进行跟踪,并对帧频为25Hz、时长为5min的实测数据进行处理和分析,得到该空间目标在不同观测时长下的IOD结果,并以轨道半长轴的测定精度为主要指标进行精度分析。实验结果表明,在同一观测时长下,所提方法能有效减小IOD误差,提高IOD的可靠性。

Considering the advantages of the unit vector method, a method is proposed for the initial orbit determination (IOD) of space targets using a camera array. The novel condition equations and details regarding the process are given. A space target is tracked by a custom-built camera array system, and the data from a 5-min long observation at 25-Hz frame rate are processed and calculated. The IOD results for the space target at different observation times are obtained, and their accuracy is analyzed by using the measurement accuracy of the orbital semi-major axis as the main indicator. The experimental results show that the proposed method effectively reduces the IOD error and enhances the IOD stability.