航天器工程2017，Vol.26Issue(2)：22-28,7.DOI:10.3969/j.issn.1673-8748.2017.02.004
应用距离搜索的低轨空间碎片初始轨道确定方法
Initial Orbit Determination Method Based on Range Searching for LEO Space Debris
摘要
Abstract
When a LEO space debris is optically observed in the scanning mode from a LEO space based telescope,only angular observations in a very short time (very short observation arc)can be collected due to high relative velocity between the debris and the telescope.It is usually difficult to obtain accurate IOD (initial orbit determination) results from such short-arc angles by using traditional Gauss and Gooding methods.In this paper,a new method is proposed to tackle this very short-arc angles-only IOD problem.In a set of given angular observations,the ranges at two epochs are tested through a step-by-step search procedure and making the problem of angles-only IOD transforming to the problem of two position vector IOD.Then,the angular observations of other epochs are used in judgment foundation of the IOD solutions to obtain an optimal solution.The method is applied to process 503 observation arcs of space debris between 10 and 60 seconds,and the results show that the errors of IOD are principally influenced by the variation rate of angular observations.Comparisons with the resuits using the Gauss and Gooding methods show that,the proposed method is significantly superior over the other two methods in both the solution success rates and accuracy,which can be used to determinate the initial orbit of space debris.关键词
空间碎片/天基光学观测/初始轨道确定/距离搜索/角度观测值Key words
space debris/space-based optical tracking/IOD(initial orbit determination)/range searching/angular observation分类
天文与地球科学引用本文复制引用
章品,桑吉章,潘腾,李怀锋..应用距离搜索的低轨空间碎片初始轨道确定方法[J].航天器工程,2017,26(2):22-28,7.基金项目
国家自然科学基金(41474021) （41474021）
