The Influence and Adaptability Analysis of Observation Array and Noise Source Distribution on the Two Microtremor Imaging Methods
The distribution of noise sources in micro-motion detection is sometimes not uniform,and different ar-rays have different adaptability to noise in different directions.To study the influence of observation array and noise source distribution on multichannel analysis of passive surface wave(MAPS)imaging and extended spatial autocorrelation(ESPAC)imaging.The noise adaptability of different arrays in different directions is quantitatively analyzed by simulating noise records,and the MAPS method is compared with the ESPAC method.The results show that the MAPS method under different arrays is consistent with the imaging effect obtained by the ESPAC method in the face of most directional noise.The two-dimensional array has better adaptability in the face of most directional noise,and the imaging effect of the multi-triangle array is the most stable.
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