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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Seismic Attenuation Tomography by Envelope Peak Instantaneous Frequency
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Seismic Attenuation Tomography by Envelope Peak Instantaneous Frequency

机译:包络峰瞬时频率的地震衰减层析成像

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摘要

This letter describes an attenuation tomography method via variations in the envelope peak instantaneous frequencies (EPIFs) of seismic signals. For a linear frequency-attenuation model, assuming that the propagating wavelet can be modeled by a Gaussian function with constant phase, an imaging formula using EPIF variation is derived. In tomography, the simultaneous iterative reconstruction technique (SIRT) with travel-time weighting is proposed for tomographic inversion. Numerical simulations of both noise-free and noise-added data show the validity of attenuation tomography from EPIF variation. SIRT with travel-time weighting yields a better reconstruction and lower residual.
机译:这封信描述了一种通过地震信号的包络峰值瞬时频率(EPIF)的变化进行的层析层析成像方法。对于线性频率衰减模型,假设可以通过具有恒定相位的高斯函数对传播的子波进行建模,则可以得出使用EPIF变化的成像公式。在层析成像中,提出了具有旅行时间加权的同时迭代重建技术(SIRT)来进行层析成像反演。无噪声和加噪声数据的数值模拟表明,EPIF变化对断层扫描的有效性。具有旅行时间加权的SIRT可以实现更好的重构,并减少残差。

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