Abstract We present a statistical analysis of meteors observed simultaneously with optical imaging and the Poker Flat Incoherent Scatter Radar (PFISR). The observations analyzed were from 3 nights (3, 4 and October 5, 2010), totaling 20.5 ​h of observation time. Optical observations alone revealed 493 meteors, while the PFISR data contained 9324 meteors over that same time period. There were 224 meteors that were detected by both PFISR and the optical imaging. The focus of this paper is on these 224 meteors that were detected by both methods. For these meteors, the masses were calculated from the optical light curves combined with the total velocities and were found to range between 0.4 and 204 ​mg. Using these meteor observations as a baseline, the minimum meteoroid mass detectable by the PFISR radar was estimated to be around 0.14 ± 0.01 ​mg for a 70 ​km/s meteor. The origination radiants of these 224 meteors were calculated in Heliocentric ecliptic coordinates and they were found to originate from many different areas in the northern hemisphere and not particularly concentrated to any of the sporadic meteor complex sources.

中文翻译：

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光学成像与Poker Flat Incoherent Scatter Radar同时观测的小质量流星统计

摘要 我们对通过光学成像和 Poker Flat 非相干散射雷达 (PFISR) 同时观测到的流星进行了统计分析。分析的观察结果来自 3 个晚上（2010 年 3 月 4 日和 10 月 5 日），总计观察时间为 20.5 小时。仅光学观测就显示了 493 颗流星，而 PFISR 数据在同一时期包含 9324 颗流星。PFISR 和光学成像共检测到 224 颗流星。本文的重点是这两种方法检测到的这 224 颗流星。对于这些流星，质量是根据光学光曲线和总速度计算得出的，发现范围在 0.4 到 204 毫克之间。使用这些流星观测作为基线，PFISR 雷达可探测到的最小流星体质量估计约为 0.14 ± 0。01 毫克对于 70 公里/秒的流星。这 224 颗流星的起源辐射点是在日心黄道坐标系中计算出来的，发现它们起源于北半球的许多不同地区，并没有特别集中于任何零星的流星复合源。