宽视场型光电望远镜的空间目标定轨精度分析

Accuracy Analysis of Orbit Determination of Space Objects for Wide Field-of-View Photoelectric Telescope

基于某光电望远镜阵列研究分析了宽视场型光电望远镜的精密定轨(POD)和轨道预报(OP)精度。利用国际激光测距服务提供的卫星激光测距数据对激光星Jason-3、Cryosat-2进行精密定轨,并将其作为参考轨道,分析了宽视场型光电望远镜观测数据对Jason-3、Cryosat-2的POD和OP精度。计算结果表明,宽视场型望远镜观测数据的POD均方根(RMS)位置误差优于250 m,速度误差的RMS小于0.25 m/s。基于POD结果的3天轨道预报精度优于20″,这表明宽视场型光电望远镜在提高观测效率的同时,能通过事后对观测数据的处理获得空间目标较高精度的轨道信息,为有轨道信息需求的工作和空间任务提供数据支持。

Based on electro-optical sensor array,the accuracy of space objects precise orbit determination(POD)and orbit prediction(OP)are studied in this paper for the wide field-of-view photoelectric telescopes.The reference orbit of Jason-3 and Cryosat-2 obtained by using satellite laser ranging data from the International Laser Ranging Service,which are used to analyze the POD and OP accuracy of the wide field-of-view photoelectric telescope observations.The calculation results show that the POD root mean square(RMS)position error of the wide field-ofview photoelectric telescope observation data is better than 250 m and the RMS of the velocity error is less than0.25 m/s.The accuracy of the 3-day orbit prediction based on the POD results is better than 20".The results indicate that the wide field-of-view photoelectric telescope can not only improve observation efficiency,but also obtain accurate orbit information of space objects through post-processing of its observations,which can provide data support for related work and space missions with orbit information.