电离层Es电波传播模型研究

张雅彬; 吴健; 许正文; 徐彬; 薛昆; 赵海生; 崔玉国

doi:10.11728/cjss2019.01.055

电离层Es电波传播模型研究

doi: 10.11728/cjss2019.01.055

中国电波传播研究所电波环境特性及模化技术重点实验室青岛 266107

基金项目:

国家自然科学基金项目资助（61601419， 11672068）

详细信息

作者简介:
张雅彬,ybzhang_2001@163.com

中图分类号: P354
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出版历程
- 收稿日期: 2017-07-11
- 修回日期: 2018-04-09
- 刊出日期: 2019-01-15

Radio Propagation Model of Ionospheric Sporadic E

National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, Qingdao 266107

摘要

摘要: 考虑大气折射的影响，对不同高度Es层条件下大圆路径传播距离与仰角的关系进行计算.基于电离层Es电子密度时空分布特点，建立高阶Es反射模型；运用高阶修正贝塞尔函数表示电离层Es电子密度扰动的自相关函数，综合考虑电离层Es各向异性结构的尺度关系，建立高阶Es散射模型.仿真计算Es层VHF斜入射传播衰减与频率、距离的关系.对于反射模型，Es层厚度越厚，电波衰减越大.对于散射模型，Es层不规则体水平尺度相同，垂直水平漂移的尺度越大，衰减越大；而垂直水平漂移的尺度相同，水平尺度越大，衰减越小.无论反射模型还是散射模型，f₀E_s越高，衰减越小；电波工作频率越高，衰减越大.对比建立的模型与VHF链路的测量结果，明确不同强度的电离层Es反射/散射机制，证明了建立模型的正确性.
- 电离层Es /
- 电波传播 /
- 反射模型 /
- 散射模型
Abstract: Considering the influence of atmospheric refraction, the relationship between the great-circle propagation distance and the elevation angle under different height Es layers is calculated. Based on the numerical model of ion density of the Es layer, and using an autocorrelation function of the fluctuation of electron density given by modified Bessel functions of the fifth, the reflection and scattering models are built considering the scale of irregularities. The relationships between the attenuation of the VHF oblique incident propagation of the Es layer and the frequency are simulated by the models. For the reflection model, the thicker the Es layer is, the greater the attenuation is. For the scattering model, the larger the vertical and horizontal drift scale are, the greater the attenuation is under the same horizontal scale of Es layer irregularities. However, if the vertical and horizontal drifts are same, the attenuation is inversely proportional to the horizontal scale. In reflection and scattering models, the higher the f₀E_s is, the smaller the attenuation is while the higher the operating frequency of radio waves is, the greater the attenuation is. The results also agree well with the observations of Es propagation path. Es reflection/scattering mechanism is clear for different intensity of ionosphere.
- Sporadic E /
- Radio propagation /
- Reflect model /
- Scatter model

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参考文献(22)

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