利用离网 Raspberry PiShake 对 OSIRIS-REx 再入大气层进行地震声学测量

Seismica Pub Date : 2024-03-26 DOI:10.26443/seismica.v3i1.1154

B. Fernando, Constantinos Charalambous, Christelle Saliby, Eleanor Sansom, Carene Larmat, David Buttsworth, Daniel Hicks, Roy Johnson, Kevin Lewis, Meaghan McCleary, Giuseppe Petricca, Nick Schmerr, Fabian Zander, Jennifer Inman

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摘要

对于识别和跟踪重返地球大气层的天然流星体来说，航天器的高超音速重返是一个宝贵的类比。我们报告了对来自 OSIRIS-REx 着陆序列的地震和声学信号的探测，这些信号是在太空舱加热峰值点附近采集的，并使用完全离网的 Raspberry PiShake 传感器进行记录。这种简单的设置能够记录地震波场和声波场的所有显著特征；包括初级冲击波、后期混响以及可能的局部诱导面波。0.7~Pa 的峰值超压和 2x10$^{-6}$~m/s 的地面速度使 3~44~Hz 之间的空地耦合系数下限达到 1.4x10$^{-6}$m/s/Pa，与其他再入大气层的结果相当。

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Seismoacoustic measurements of the OSIRIS-REx re-entry with an off-grid Raspberry PiShake

Hypersonic re-entries of spacecraft are valuable analogues for the identification and tracking of natural meteoroids re-entering the Earth's atmosphere. We report on the detection of seismic and acoustic signals from the OSIRIS-REx landing sequence, acquired near the point of peak capsule heating and recorded using a fully off-grid Raspberry PiShake sensor. This simple setup is able to record all the salient features of both the seismic and acoustic wavefields; including the primary shockwave, later reverberations, and possible locally induced surface waves. Peak overpressures of 0.7~Pa and ground velocities of 2x10$^{-6}$~m/s yield lower bound on the air-to-ground coupling factor between 3 and 44~Hz of 1.4x10$^{-6}$m/s/Pa, comparable to results from other re-entries

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Seismica

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