Evaluation of the effect of sporadic-E on high frequency radio wave propagation in the Arctic
Evaluation of the effect of sporadic-E on high frequency radio wave propagation in the Arctic
复制标题
北极地区偶发E对高频无线电波传播影响的评估
DOI：
10.1016/j.jastp.2022.105826
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发表时间：
2022
影响因子：
1.9
通讯作者：
Cameron T
中科院分区：
文献类型：
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作者：
Cameron T
高频（HF）无线电传播和超视距雷达（OTHR）等应用对空间天气引起的电离层干扰很敏感。改进的高纬度和极地电离层模拟和监测技术支持高质量的OTHR远程监测。其中一种电离层扰动是散射- e，这种现象是e区（大约90-150 千米高度）电子密度的稀薄增强作为高频无线电波的强反射器。在这项研究中，我们对2012年7月11日在尤里卡上空探测到的一层散射e层对高频无线电传播的影响进行了案例研究。我们使用高频无线电接收机测量与电离层相交的路径，同时对电离层进行电离层测量，并通过包含偶发e层模型的电离层模型的一系列射线轨迹来研究这一事件。利用这些测量和模拟，我们展示了散射- e在某些情况下如何帮助高频无线电传播，并表明一个简单的高斯散射- e模型可以复制真实的高频无线电测量。我们也评论零星e如何影响其他手术。
High Frequency (HF) radio propagation, and applications such as Over-The-Horizon Radar (OTHR), is sensitive to ionospheric disturbances caused by space weather. Improved ionospheric modelling and monitoring techniques for the high-latitude and polar regions supports high quality OTHR long-range surveillance. One such ionospheric disturbance is Sporadic-E, a phenomenon in which a thin enhancement in E-region (approximately 90–150 km altitude) electron density acts as a strong reflector of HF radio waves. In this study, we perform a case study of the effect a sporadic-E layer has on HF radio propagation for a layer that was detected over Eureka on July 11, 2012. We study this event using HF radio receiver measurements for a path intersecting the layer, simultaneous ionosonde measurements of the layer, and a series of ray traces through a model ionosphere containing a model of the sporadic-E layer. Utilizing these measurements and simulations, we show how sporadic-E can aid HF radio propagation in some cases, and show that a simple Gaussian sporadic-E model can replicate real HF radio measurements. We also comment on how sporadic-E could affect OTHR operation.