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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Detection of acoustic/infrasonic/seismic waves generated by hypersonic re-entry of the HAYABUSA capsule and fragmented parts of the spacecraft
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Detection of acoustic/infrasonic/seismic waves generated by hypersonic re-entry of the HAYABUSA capsule and fragmented parts of the spacecraft

机译：探测HAYABUSA舱的高超声速再入和航天器碎裂部分产生的声/次声/地震波

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摘要

Acoustic/infrasonic/seismic waves were observed during the re-entry of the Japanese asteroid explorer "HAYABUSA" at 6 ground sites in Woomera, Australia, on 2010 June 13. Overpressure values of infrasound waves were detected at 3 ground sites in a range from 1.3 Pa, 1.0 Pa, and 0.7 Pa with each distance of 36.9 km, 54.9 km, and 67.8 km, respectively, apart from the SRC trajectory. Seismic waveforms through air-to-ground coupling processes were also detected at 6 sites, showing a one-to-one correspondence to infrasound waves at all simultaneous observation sites. Audible sound up to 1 kHz was recorded at one site with a distance of 67.8 km. The mother spacecraft was fragmented from 75 km down to 38 km with a few explosive enhancements of emissions. A persistent train of HAYABUSA re-entry was confirmed at an altitude range of between 92 km down to 82 km for about 3minutes. Light curves of 136 fragmented parts of the spacecraft were analyzed in detail based on video observations taken at multiple ground sites, being classified into three types of fragmentations, i.e., melting, explosive, and re-fragmented types. In a comparison between infrasonic waves and video-image analyses, regarding the generation of sonicboom type shock waves by hypersonically moving artificial meteors, both the sample return capsule and fragmented parts of the mother spacecraft, at an altitude of 40±1 km were confirmed with a one-to-one correspondence with each other.
机译：2010年6月13日，日本小行星探测器“ HAYABUSA”在澳大利亚伍默拉的6个地面点重新进入期间，观察到了声波/次声波/地震波。距离SRC轨迹分别为1.3 Pa，1.0 Pa和0.7 Pa，各自的距离分别为36.9 km，54.9 km和67.8 km。还通过6个地点检测到了通过空对地耦合过程的地震波形，显示了在所有同时观测地点与次声波一一对应。在一个距离为67.8 km的站点上，录制了高达1 kHz的声音。母飞船从75公里下降到38公里，并产生了爆炸性的爆炸性增长。在从92 km到82 km的高度范围内，确认了持续不断的HAYABUSA再入火车，持续约3分钟。根据在多个地面站点拍摄的视频观察结果，详细分析了航天器136个破碎部分的光曲线，分为三类碎片，即融化，爆炸和再碎片化。在次声波和视频图像分析之间的比较中，关于超声速移动人造流星产生的声爆型冲击波，确认了样品返回舱和母飞船碎片在40±1 km的高度，彼此一一对应。

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