一种适用于相机阵列的空间目标初轨确定方法
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摘要
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.
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.
引文
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[3]Wang J L.Development of technologies for detection and identification of space objects with ground-based E-O systems[J].Journal of Spacecraft TT&CTechnology,2015,34(6):489-499.王建立.空间目标地基光电探测与识别技术的发展[J].飞行器测控学报,2015,34(6):489-499.
[4]Zhang J X.Progress in foreign ground-based optoelectronic detecting system for space target detection[J].Chinese Journal of Optics and Applied Optics,2009,2(1):10-16.张景旭.国外地基光电系统空间目标探测的进展[J].中国光学与应用光学,2009,2(1):10-16.
[5]Taff L G.On initial orbit determination[J].The Astronomical Journal,1984,89:1426-1428.
[6]Lu B K,Ma J Y,Xia Y,et al.A method of initial orbit determination for long arc[J].Acta Astronomica Sinica,2003,44(4):369-374.陆本魁,马静远,夏益,等.一种适用于长弧段的初轨计算方法[J].天文学报,2003,44(4):369-374.
[7]Dai D K,Wang X S,Hu C S,et al.Camera calibration and attitude measurement technology based on astronomical observation[J].Acta Optica Sinica,2012,32(3):0312005.戴东凯,王省书,胡春生,等.基于天文观测的相机标定及姿态测量技术研究[J].光学学报,2012,32(3):0312005.
[8]Liu Y,Dai D K,Ma L H,et al.A star sensor calibration method based on attitude correlated frame[J].Acta Optica Sinica,2017,37(11):1128003.刘宇,戴东凯,马丽衡,等.一种基于姿态关联帧的星敏感器标定方法[J].光学学报,2017,37(11):1128003.
[9]Yang B,Li Y C,Zhang T H,et al.Initial orbit determination using camera array[C].Society of Photo-Optical Instrumentation Engineers,2018.
[10]Xu W.Star fast extraction and high accuracy centroid estimation of star camera[D].Hangzhou:Zhejiang University,2013:33-37.许威.星点快速提取与高精度定位技术研究[D].杭州:浙江大学,2013:33-37.
[11]Li X L,Yang J H,Zhang L,et al.Further optimization of selected observation triangles technique before star pattern matching[J].Journal of Astronautics,2015,36(1):76-81.李欣璐,杨进华,张刘,等.星图匹配观测三角形优化选取技术[J].宇航学报,2015,36(1):76-81.
[12]Mao W,Ji K F,Li B H,et al.CCD astrophysics[M].Kunming:Yunnan Science and Technology Press,2003:43-100.冒蔚,季凯帆,李彬华,等.CCD天体测量学[M].昆明:云南科技出版社,2003:43-100.
[13]Mao Y X.Unit vector method for spacecraft orbit determination[M].Beijing:National Defense Industry Press,2009:149-169.茅永兴.航天器轨道确定的单位矢量法[M].北京:国防工业出版社,2009:149-169.