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arXiv 2202.01976physics.ins-detphysics.optics
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频谱噪声形状和laser光束抖动相关性对空间光链路捕获的影响

Impact of spectral noise shape and correlations of laser beam jitter on acquiring optical links in space

Gerald Hechenblaikner

摘要:

我们调查如何获得扫描和目标航天器之间的光学链路的概率取决于光束抖动的光谱形状,功率和维数,以及对检测器的集成时间,光束检测半径和扫描速度的选择。对于慢扫描和长的集成时间,故障的概率(Pfail)是由集成的抖动功率到一个临界频率,我们通过比较分析模型的结果进行验证的蒙特卡罗模拟。只要RMS抖动幅度不超过光束直径,高于临界频率的抖动会导致积分窗口之间的相关性损失,并降低1d(径向)和2d(径向和切向)抖动的Pfail。在快速扫描和短积分时间的相反限制下,两个相邻扫描轨道上的抖动波动之间的紧急相关性也会降低Pfail。分析模型还用于评估多个重叠轨迹的影响和不确定性平面中目标漂移的影响。

英文摘要:

We investigate how the probability of acquiring an optical link between a scanning and a target spacecraft depends on the spectral shape, power and dimensionality of the beam jitter, as well as on the choice of detector integration time, beam detection radius and scan speed. For slow scans and long integration times, the probability of failure (Pfail) is determined by the integrated jitter power up to a critical frequency, which we verify by comparing the results of an analytical model to those of Monte Carlo simulations. Jitter above the critical frequency leads to a loss of correlation between integration windows and decreases Pfail for both, 1d (radial) and 2d (radial and tangential) jitter, as long as the RMS jitter amplitude does not exceed the beam diameter. In the opposite limit of fast scans and short integration times, emergent correlations between jitter fluctuations on two adjacent scanning tracks also decrease Pfail. The analytical model is additionally used to assess the effect of multiple overlapping tracks and the impact of target drifts in the uncertainty plane.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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