弱太阳闪烁对深空电波传播影响的预测模型

发布时间：2018-04-19 20:56

本文选题：深空通信 + 无线电波　；参考：《电波科学学报》2017年04期

【摘要】：针对上合期间太阳风湍涡不规则性对穿过日冕区无线电波所引发的太阳闪烁问题,基于弱闪烁理论提出一种幅度起伏、相位起伏和到达角起伏的预测模型.该模型充分考虑了上合期间通信链路的几何模型、日冕背景参数和太阳风湍涡谱模型.仿真结果指出,太阳风湍涡外尺度、湍涡谱指数对太阳闪烁有较大的影响.太阳闪烁对无线电波的影响随日径距离的增大而逐渐减小,且随无线电波工作频率的提高而减小.与实测数据的对比结果进一步表明,所提预测模型具有较高的精度,且其准确性随电波工作频率的增大而提高.因此,提出的太阳闪烁预测模型可对未来的深空探测活动提供参考依据.
[Abstract]:In view of the solar scintillation caused by the irregularity of solar wind turbulence over the coronal region, a prediction model of amplitude fluctuation, phase fluctuation and angle of arrival fluctuation is proposed based on the weak scintillation theory. The geometric model, coronal background parameters and solar wind turbulence spectrum model are fully considered in this model. The simulation results show that the external scale and spectral exponent of the solar wind turbulence vortex have great influence on the solar scintillation. The influence of solar scintillation on radio wave decreases with the increase of diurnal distance and the operating frequency of radio wave. The comparison with the measured data further shows that the proposed prediction model has a high accuracy and its accuracy is improved with the increase of the frequency of the radio wave. Therefore, the proposed solar scintillation prediction model can provide a reference for future deep space exploration activities.
【作者单位】：华东师范大学信息科学技术学院;
【分类号】：TN011

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