地质学
模态色散
水深测量
声学
反演(地质)
水听器
大地测量学
声色散
图像扭曲
地震学
计算机科学
光学
物理
海洋学
声波
人工智能
构造学
光纤
光纤传感器
色散位移光纤
作者
Jin-bao Weng,Stan E. Dosso,N. Ross Chapman,Yanming Yang,Zhao-Hui Peng,Guangxu Wang,Lingshan Zhang
出处
期刊:Journal of the Acoustical Society of America
[Acoustical Society of America]
日期:2019-10-01
卷期号:146 (4_Supplement): 2929-2929
摘要
This paper presents geoacoustic inversion of modal dispersion data in the South China Sea using a single hydrophone and multiple impulsive sources at ranges from 5–100 km along a shallow-water track with slowly varying bathymetry. As a first step, the source waveform and bubble pulse are deconvolved from the recorded time series using a short-range source recording, corrected for the surface reflection. A time-frequency warping analysis is used to filter individual modes and obtain dispersion (arrival time as a function of frequency) data for three modes. Trans-dimensional Bayesian inversion is applied to the modal dispersion data, based on probabilistic sampling over an unknown number of seabed layers. Range-dependent inversion is considered, based on separating the environment into a sequence of range-independent sections, with frequency-dependent modal propagation times summed over segments. The inversion results are compared to core samples collected at sites along the survey line and to an independent headwave arrival-time analysis of the impulsive-source data.
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