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驰豫碰撞模型下非相干散射谱的计算 被引量:4

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摘要 在驰豫模型下利用十三阶矩近似求得视线方向的分布函数,利用这样的分布函数来计算非相干散射谱.由于十三阶矩近似是以Maxwell分布为基展开的多项式解,除了Maxwell项,它还包括了热流项和粘滞项的贡献.而正是由于这两项的贡献导致了由它计算的谱函数会出现不对称.现有的非相干散射雷达的数据处理都是在假定离子的分布函数是Maxwell分布的条件下进行的,由此得到的电离层离子温度和电子温度都是不精确的,因此利用驰豫模型下的十三阶矩近似求得的分布函数能提高非相干散射谱的精度和减少在推导电离层参数过程中的误差.
出处 《自然科学进展》 北大核心 2007年第11期1565-1571,共7页
基金 国家自然科学基金(批准号:40310223) 国防重点实验基金资助项目
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参考文献20

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