Wavefront profiling via correlation of GLAO open loop telemetry
Wavefront profiling via correlation of GLAO open loop telemetry
复制标题
通过 GLAO 开环遥测相关性进行波前分析
DOI：
10.1117/12.2629613
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Baranec, Christoph
中科院分区：
文献类型：
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作者：
McEwen, Eden;Dungee, Ryan;Chun, Mark R.;Lu, Jessica;Lai, Olivier;Baranec, Christoph
通过更详细地了解地面观测站试图修正的大气，可以在设计和算法上加强地面观测站中使用的自适应光学(AO)。这一点在莫纳凯岛上表现得最为明显，在那里，大气的更清晰的轮廓使AO系统从极低层(Exao)向宽场近地面层(GLAO)的小范围分离发展。利用夏威夷大学2.2米望远镜上的IMAKA GLAO演示器获得的遥测数据，我们应用了一种通过多个波前传感器(WFSS)的时空互相关来识别湍流层速度的风廓线方法。我们将导出层的风速与附近的风速计资料和气象模式对高空风速的预测进行了比较，并讨论了异同。通过成功地将注入的模拟地层恢复到实际遥测中，评估了这种剖面法的优点和局限性。我们详细介绍了剖面仪的结果，包括在冬季和夏季目标的开环遥测上的四个特征IMAKA观测运行的数据与可行估计的百分比。我们报告了这些层与外部测量的相似程度，这些结果的可信度，以及未来在其他多共轭声光系统中使用该技术的潜力。
Adaptive Optics (AO) used in ground based observatories can be strengthened in both design and algorithms by a more detailed understanding of the atmosphere they seek to correct. Nowhere is this more true than on Maunakea, where a clearer profile of the atmosphere informs AO system development from the small separations of Extreme AO (ExAO) to the wide field Ground Layer AO (GLAO). Employing telemetry obtained from the imaka GLAO demonstrator on the University of Hawaii 2.2-meter telescope, we apply a wind profiling method that identifies turbulent layer velocities through spatial-temporal cross correlations of multiple wavefront sensors (WFSs). We compare the derived layer velocities with nearby wind anemometer data and meteorological model predictions of the upper wind speeds and discuss similarities and differences. The strengths and limitations of this profiling method are evaluated through successful recovery of injected, simulated layers into real telemetry. We detail the profilers' results, including the percentage of data with viable estimates, on four characteristic imaka observing runs on open loop telemetry throughout both winter and summer targets. We report on how similar layers are to external measures, the confidence of these results, and the potential for future use of this technique on other multi conjugate AO systems.
超大望远镜的自适应光学 III 使用 GEMS 遥测数据分析冻结流假设
DOI：
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发表时间：
2013
期刊：
影响因子：
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作者：
Á. Cortés;Alexander Rudy;B. Neichel;L. Poyneer;M. Ammons;Andrés;Guesalaga
通讯作者：
Guesalaga