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Measurement and analysis of atmospheric optical turbulence in a near-maritime environment
IOP SciNotes Pub Date : 2020-10-01 , DOI: 10.1088/2633-1357/abba45
Christopher Jellen 1 , Charles Nelson 2 , Cody Brownell 1 , John Burkhardt 1 , Miles Oakley 2
Affiliation  

The index of refraction structure constant, ${C}_{n}^{2},$ characterizing the intensity of optical turbulence, describes the disruption of a propagating electromagnetic beam passing through an inhomogeneously heated turbulent environment. In order to improve predictive models, it is critical to develop a deeper understanding of the relationships between environmental parameters and optical turbulence. To that end, an overwater, 890 m scintillometer link was established along the Chesapeake Bay adjacent to the Severn River in Annapolis, Maryland. Specifically, ${C}_{n}^{2}$ data from the scintillometer, as well, as numerous meteorological parameters were collected over the period of approximately 15 months to characterize a scintillometer link in the near-maritime environment. The characteristics of this near-maritime link were distinct from those observed in prior over-land and open ocean links. Further, existing macro-meteorological models for predicting ${C}_{n}^{2}$ from environmental parameters developed for open-ocean links were shown to perform poorly in the near-maritime environment. While the offshore adapted macro-meteorological model demonstrated lower prediction error, this study suggests that new models could be developed to reduce ${C}_{n}^{2}$ prediction error in the near-maritime environment. The complete data set, including ${C}_{n}^{2}$ measurements, and to our knowledge, one of the first to extend beyond one year, is available.



中文翻译:

近海环境下大气光学湍流的测量与分析

折射率结构常数,${C}_{n}^{2},$表征光学湍流的强度,描述传播的电磁束通过不均匀加热的湍流环境的中断。为了改进预测模型,深入了解环境参数与光学湍流之间的关系至关重要。为此,在马里兰州安纳波利斯的塞文河附近的切萨皮克湾建立了一个 890 m 的水上闪烁仪连接。具体来说,${C}_{n}^{2}$来自闪烁仪的数据也是如此,因为在大约 15 个月的时间里收集了大量气象参数,以表征近海环境中闪烁仪的联系。这种近海连接的特征与之前在陆地和公海连接中观察到的特征不同。此外,现有的宏观气象模型用于${C}_{n}^{2}$根据为公海链路开发的环境参数进行预测,在近海环境中表现不佳。虽然近海适应的宏观气象模型显示出较低的预测误差,但这项研究表明可以开发新模型来减少${C}_{n}^{2}$近海环境中的预测误差。完整的数据集,包括${C}_{n}^{2}$ 测量,据我们所知,第一个超过一年的测量是可用的。

更新日期:2020-10-01
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