Effect of time‐dependent 3‐D electron density gradients on high angle of incidence HF radiowave propagation
Effect of time‐dependent 3‐D electron density gradients on high angle of incidence HF radiowave propagation
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时间相关的 3D 电子密度梯度对高入射角高频无线电波传播的影响
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
C. Coker
中科院分区：
文献类型：
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作者：
K. Zawdie;D. Drob;J. Huba;C. Coker
在实际应用中利用高频无线电波的挑战之一是了解信号如何在时间和距离相关的多径环境中传播。对于典型的静止电离层条件，解释接收到的HF信号通常是相当简单的。然而，对于受干扰的电离层条件，例如在存在大倾斜、不规则性和中等规模移动电离层扰动（MSTID）的情况下，数据解释和利用往往变得具有挑战性。本文提出了一种理论HF传播建模研究，利用第一原理，中尺度分辨率电离层代码，SAMI 3（Sami 3是电离层的另一种模型）和三维射线跟踪方程的新实现，MoJo-15（现代化琼斯代码）的能力，以检查各种HF传播观测值和MSTID特性之间的关系。本文演示了在典型的低纬度，日落后电离层条件下，高入射角HF传播的MSIDS的影响，并检查可能连接给定的源和接收器的多个传播路径的时空演变。
One of the challenges for the utilization of HF radiowaves in practical applications is to understand how the signals propagate in time‐ and range‐dependent multipath environments. For typical quiescent ionospheric conditions it is often reasonably straightforward to interpret received HF signals. For disturbed ionospheric conditions, however, such as in the presence of large tilts, irregularities, and medium‐scale traveling ionospheric disturbances (MSTIDs), data interpretation and utilization often becomes challenging. This paper presents a theoretical HF propagation modeling study that exploits the capabilities of a first principles, mesoscale resolution ionosphere code, SAMI3 (Sami3 is Another Model of the Ionosphere) and a new implementation of the 3‐D ray trace equations, MoJo‐15 (Modernized Jones Code) in order to examine the relationship between various HF propagation observables and MSTID characteristics. This paper demonstrates the implications of MSTIDS on high angle of incidence HF propagation during typical low‐latitude, postsunset ionospheric conditions and examines the spatiotemporal evolution of multiple propagation paths that may connect a given source and receiver.