Comparing TID simulations using 3‐D ray tracing and mirror reflection
Comparing TID simulations using 3‐D ray tracing and mirror reflection
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DOI：
10.1002/2015rs005872
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发表时间：
2016-04
期刊：
影响因子：
1.6
通讯作者：
X. Huang;B. Reinisch;G. Sales;V. Paznukhov;I. Galkin
中科院分区：
文献类型：
--
作者：
X. Huang;B. Reinisch;G. Sales;V. Paznukhov;I. Galkin
测量电离层反射高频波的多普勒频率和到达角的时间变化已被提出作为探测电离层行波扰动（TID）发生的一种手段。通过国际参考电离层（IRI）的电子密度模型，在努力重现测量签名使用射线跟踪进行模拟。TID由在电离层中水平传播的3-D电子密度的波状扰动表示，其振幅随时间呈正弦变化。通过明智地选择TID参数，射线跟踪模拟再现了所观察到的多普勒频率和AoA。然而，考虑到所涉及的归航程序，3D真实电离层中的射线追踪非常耗时。结果表明，一个精心选择的反射波纹镜可以再现的时间变化的AoA和多普勒频率。通过IRI模型电离层的射线追踪和镜像模型反射的结果进行了比较，以评估镜像反射模型的适用性。
Measuring the time variations of Doppler frequencies and angles of arrival (AoA) of ionospherically reflected HF waves has been proposed as a means of detecting the occurrence of traveling ionospheric disturbances (TIDs). Simulations are made using ray tracing through the International Reference Ionosphere (IRI) electron density model in an effort to reproduce measured signatures. The TID is represented by a wavelike perturbation of the 3‐D electron density traveling horizontally in the ionosphere with an amplitude that varies sinusoidally with time. By judiciously selecting the TID parameters the ray tracing simulation reproduces the observed Doppler frequencies and AoAs. Ray tracing in a 3‐D realistic ionosphere is, however, excessively time consuming considering the involved homing procedures. It is shown that a carefully selected reflecting corrugated mirror can reproduce the time variations of the AoA and Doppler frequency. The results from the ray tracing through the IRI model ionosphere and the mirror model reflections are compared to assess the applicability of the mirror‐reflection model.