Temporal changes in the lunar soil from correlation of diffuse vibrations.
Temporal changes in the lunar soil from correlation of diffuse vibrations.
复制标题
弥散振动相关性引起的月壤时间变化。
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
É. Larose
中科院分区：
文献类型：
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作者：
C. Sens‐Schönfelder;É. Larose
最近的研究表明，可以通过互相关漫射波或环境噪声来重建无源传感器之间的脉冲响应。利用在月球上记录的地震波，我们在这里表明，不仅可以检索直达波，还可以检索在到达地震仪之前已分散的晚到波。由于这些迟到的信号传播的时间较长，因此它们对介质的微弱扰动（例如速度变化）更加敏感。散射波的高灵敏度用于通过测量被动检索的尾波的小延迟来监测月球土壤中的周期性速度变化。速度变化是由于太阳周期性加热月球表面而导致的温度变化造成的。
It was recently demonstrated that one can reconstruct the impulse response between passive sensors by cross-correlating diffuse waves or ambient noise. Using seismic waves recorded on the moon, we show here that not only direct waves can be retrieved, but also late arrivals that have been scattered before reaching the seismometers. As these late arrivals propagate for a longer time, they are more sensitive to weak perturbations of the medium such as velocity changes. This high sensitivity of scattered waves is used to monitor periodic velocity changes in the lunar soil by measuring small delays of the passively retrieved coda waves. The velocity changes result from temperature variations due to periodic heating of the lunar surface by the sun.