Abstract

采用连续的微流星体消融模型,对小微粒的流星颗粒(半径<100 μm)消融过程进行分析,并估计对中高层区域(80~110 km)金属层的影响.无线电流星雷达与激光雷达的探测结果表明,半径在100 μm以上的流星颗粒的消融物并不是金属层主要的源.本文从流星颗粒的动量方程和能量方程出发,计算不同半径下的流星微粒在不同的注入速度下的消融剖面,并分析了流星消融截止高度的变化趋势.结合长期的激光雷达观测,计算表明,10~40 μm半径的流星微粒是普通金属层的主要影响因素.

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