Abstract The SKYiMET meteor radar is capable of measuring the height distribution of ionized meteor trails. Observations of the Sodankyla radar (67°N, 23°E) in 2008–2019 are analyzed. A method is applied, based on the median and quartiles of meteor heights, for distinguishing meteor showers from much more intense background sporadic meteors. Since the shower meteors are commonly less dense and enter the Earth’s atmosphere at a larger velocity, they produce ionization up to 3 ​km higher than sporadic meteors. This effect manifests itself in the form of narrow peaks that are clearly visible in the median and quartiles of the meteor height. Seven established showers with zenith hourly rate (ZHR) ​> ​12 were identified. In addition, using both the height parameters and the radiant distribution, a signature of a former meteor stream evolving into sporadic meteors is found. This additional sporadic inflow has an antihelion source and occurs in the January.

中文翻译：

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从流星回波的高度分布推断流星雨和零星的特征

摘要 SKYiMET流星雷达能够测量电离流星轨迹的高度分布。分析了 2008-2019 年 Sodankyla 雷达（67°N，23°E）的观测结果。应用了一种基于流星高度的中位数和四分位数的方法，用于将流星雨与更强烈的背景零星流星区分开来。由于流星通常密度较小并且以较大的速度进入地球大气层，因此它们产生的电离比零星流星高 3 公里。这种效应以窄峰的形式表现出来，在流星高度的中位数和四分位数中清晰可见。确定了 7 个具有天顶小时费率 (ZHR) > 12 的既定阵雨。此外，同时使用高度参数和辐射分布，发现了前流星流演变成零星流星的特征。这个额外的零星流入有一个反日点源，发生在 1 月。