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INSTANTANEOUS POLARIZATION ATTRIBUTES AND DIRECTIONAL FILTERING

机译:瞬时极化属性和方向滤波

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We introduce a systematic definition of instantaneous attributes for an arbitrary multicomponent seismic signal. The definition is a natural generalization of known complex trace attributes of a one-component signal. Instantaneous amplitude and all polarization parameters are defined as invariants of ''instantaneous phase rotation.'' The principal feature of our approach is the unique definition of the instantaneous phase for a signal with any number of components. Plots of subtle polarization parameters of multicomponent seismic data are easily obtained using conventional seismic plotting routines. We illustrate our approach on a synthetic example and apply it to real 3-component, wide-angle crustal data. Plots of polarization attributes provide evidence for shear-wave splitting in an Sg arrival. Having determined the instantaneous polarization vector, we design a new type of time-domain spatial directional filter. The filter enhances linearly polarized events with specified instantaneous polarization. The filter can work with any number of components in the data, has no user-specified parameters, and is controlled only by the signal. We conclude that rigorously defined instantaneous phase, amplitude, and polarization attributes provide new effective means for the visualization, analysis, and processing of multicomponent signal. [References: 19]
机译:我们介绍了任意多分量地震信号的瞬时属性的系统定义。该定义是对单分量信号的已知复杂迹线属性的自然概括。瞬时振幅和所有极化参数均定义为“瞬时相位旋转”的不变性。我们方法的主要特征是对具有任意数量分量的信号的瞬时相位的唯一定义。使用常规地震标绘例程可以轻松获得多分量地震数据的细微极化参数图。我们在一个综合示例中说明了我们的方法,并将其应用于真实的3分量,广角地壳数据。极化属性图为Sg到达中的剪切波分裂提供了证据。确定了瞬时极化矢量后,我们设计了一种新型的时域空间定向滤波器。滤光片以指定的瞬时极化增强线性极化事件。该过滤器可以与数据中的任何数量的组件一起使用,没有用户指定的参数,并且仅由信号控制。我们得出的结论是,严格定义的瞬时相位,幅度和极化属性为多分量信号的可视化,分析和处理提供了新的有效手段。 [参考:19]

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