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首页> 外文期刊>Journal of guidance, control, and dynamics >Bearings-Only Initial Relative Orbit Determination
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Bearings-Only Initial Relative Orbit Determination

机译:仅方位角的初始相对轨道确定

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摘要

A method for performing bearings-only initial relative orbit determination of a nearby space object in the absence of any information regarding the space object's geometry and relative orbit is presented. To resolve the range ambiguity characteristic of a single optical sensor system, a second optical sensor is included at a known baseline distance on the observing spacecraft. To formulate an initial estimate of the space object's relative orbit and its associated uncertainty, the angle measurements from both sensors are used to bound a region for all possible relative positions of the space object. A parameterized probability distribution in relative position that reflects uniform relative range uncertainty across the bounded region is constructed at two unique times. Linkage of the positional distributions is performed using a second-order relative Lambert solver to formulate a full-state probability density function in relative position and velocity, which can be further refined through processing subsequent measurement data in a Bayesian framework.
机译:提出了一种在不存在关于空间物体的几何形状和相对轨道的任何信息的情况下仅对附近空间物体进行方位的初始相对轨道确定的方法。为了解决单个光学传感器系统的范围模糊特性,在观测航天器上以已知基线距离包括了第二个光学传感器。为了制定空间物体相对轨道及其相关不确定性的初始估计,使用两个传感器的角度测量值来为空间物体所有可能的相对位置界定一个区域。在两个唯一的时间构造在相对位置的参数化概率分布,该分布反映了整个有界区域的均匀相对范围不确定性。使用二阶相对Lambert求解器执行位置分布的链接,以公式化相对位置和速度的全状态概率密度函数,可以通过在贝叶斯框架中处理后续的测量数据来进一步完善该概率函数。

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