阵列结构型空间碎片光电望远镜观测精度分析

阵列结构型空间碎片光电望远镜(SDPTA)具有通用性强、视场大、单元众多、覆盖空域广、可靠性高等优点,针对国内首台阵列结构型空间碎片光电望远镜产生的大量观测数据无法识别的问题,提出一种基于两行轨道根数(TLE)数据的快速匹配识别方法。通过计算北美防空司令部(NORAD)发布的TLE数据对阵列结构型空间碎片光电望远镜的观测数据关联比对,用以识别空间碎片;并利用CPF(consolidated prediction format)星历的数据对已识别的数据中的激光星进行外符精度分析,检核识别准确性并对该阵列结构型空间碎片光电望远镜观测精度进行分析。经计算,该阵列结构型空间碎片光电望远镜外符精度为7. 9″。计算分析表明,利用TLE数据对未知碎片进行识别的方法准确有效,望远镜的观测精度达到了设计指标。

Observational Data Analysis of Space Objects with Space Debris Photo-electric Telescope Array

In order to identify the large quantities of unknown data observed by Space Debris Photo-electric Telescope Array(SDPTA),an identification method based on Tow-Line Elements (TLE) data was used in this paper.The TLE data was calculated as a reference.The observation passes were matched with the TLE data to identified the number of space object .In order to judge the accuracy of Space Debris Photo-electric Telescope Array, CPF ephemeris was used to calculate the root mean squer error(RMS) between observation passes and theoretical values.The results show that the root mean square error between CPF ephemeris and observation passes is 7.9 arc seconds .This result shows that identifying the unknown observation data using the TLE data is a feasible solution.It is concluded that the accuracy of the Space Debris Photo-electric Telescope Array has reached the design.