| 基于各向异性分布的非相干散射雷达谱仿真 |
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| 引用本文： | 徐彬,王占阁,许正文,吴健,薛昆.基于各向异性分布的非相干散射雷达谱仿真[J].空间科学学报,2017,37(6):710-716. |
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| 作者姓名： | 徐彬 王占阁 许正文 吴健 薛昆 |
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| 作者单位： | 中国电波传播研究所 电波信息环境特性及模化技术国防科技重点实验室 青岛 266107 |
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| 基金项目： | 国家自然科学基金项目（41004065，41104108，61601419，11672068）和电波环境特性及模化技术重点实验室基金项目共同资助 |
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| 摘 要： | 基于离子在加热条件下呈现各向异性分布的假设，建立离子声波激发条件下非平衡态的三维离子速度分布函数模型，给出任意视线方向上非相干散射谱的计算方法，分析幅度修正因子、离子声速粒子组分、雷达波束方向与磁场方向夹角及温度各向异性对功率谱的影响.研究结果可以解释离子线谱超过一个量级的幅度增强现象和上行离子线强于下行离子线的不对称现象，对加热强扰动电离层条件下的等离子体参数反演具有重要意义.
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| 关 键 词： | 各向异性分布 离子声波激发 非相干散射谱 离子体参数反演 |
| 收稿时间： | 2016-10-18 |
Simulation of Incoherent Scatter Radar Spectra Based on Inhomogeneous Distribution |
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| Institution: | National Key Laboratory of Electromagnetic Environment, China Research Institute ofRadio Wave Propagation, Qingdao 266107 |
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| Abstract: | Based on the theoretical hypothesis of ion inhomogeneous distribution during ionospheric heating, the model of non-equilibrium 3D velocity distribution of the ions with acoustic frequency exciting is built, and the calculation method of incoherent scatter spectra with arbitrary line of sight are presented. The effect of the amplitude modifying factor, particle component of acoustic frequency, the angle between radar beam and magnetic field direction, and temperature inhomogeneous on power spectra are analyzed. The results can perfectly explain amplitude enhancement of ion line that is more than an order of magnitude, and asymmetry phenomena when the ascending ion line is stronger than the down ion line. The study has great significance for plasma parameter inversion under the condition of strong disturbance heating of ionospheric. |
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