| 一种天基光学GEO目标定位方法及初轨算法观测几何评价 |
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| 引用本文： | 王雪莹,李骏,安玮.一种天基光学GEO目标定位方法及初轨算法观测几何评价[J].航天控制,2012,30(2):46-50,56. |
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| 作者姓名： | 王雪莹 李骏 安玮 |
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| 作者单位： | 国防科技大学电子科学与工程学院,长沙,410073 |
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| 摘 要： | 提出一种基于天基光学短弧观测数据对GEO区目标进行定位的方法,以GEO区目标半径、偏心率为几何约束,通过最小二乘法估计目标位置、速度,估计结果可作为初轨算法的输入,也可以为初值预测轨道,引导其它平台对目标观测。利用广义Laplace初轨算法对多平台多观测弧段处理,为表征观测几何对定轨性能的影响,将几何精度因子(GOP)扩展到多平台多观测弧段,并引入几何精度因子的误差灵敏度(ESGOP)表征测量误差对观测几何的影响,仿真结果表明:对GEO目标而言,当GOP不小于0.03、ESGOP不大于0.005时,对目标的初轨精度可控制在50km之内。
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| 关 键 词： | 天基光学 短弧观测 同步目标定位 观测几何精度 |
A Novel Method of Locating GEO Objects with Space-Based Optical Short Arcs Observation and the Geometric of Precision for Initial Orbit Determination |
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| WANG Xueying
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LI Jun
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AN Wei.A Novel Method of Locating GEO Objects with Space-Based Optical Short Arcs Observation and the Geometric of Precision for Initial Orbit Determination[J].Aerospace Control,2012,30(2):46-50,56. |
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| Authors: | WANG Xueying LI Jun AN Wei |
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| Institution: | College of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | A main challenge in space-based optical surveillance is to make use of short arcs observations.A novel method for locating GEO objects from short arcs observations is proposed in this paper.Due to the constraints of GEO region’s radius,the position and velocity can be estimated by using Least Square,and they can be used either as the input of an initial orbit determination or the initial value of orbit prediction.The geometric of precision is extended to measure characteristics of the coefficient matrix of Laplacian function especially for the multi-observer-multi-arcs cases.The ESGOP is imported to illustrate the effect of data errors.The result of simulation shows that the location precision of GEO objects can be less than 50km when GOP is bigger than 0.03 and ESGOP is smaller than 0.005. |
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| Keywords: | Space-based optical Short arcs observation Locating GEO objects Geometric of precision |
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