ASPECTS OF VERTICAL SEISMIC RESOLUTION
ASPECTS OF VERTICAL SEISMIC RESOLUTION
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DOI：
10.1111/j.1365-2478.1981.tb01008.x
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发表时间：
1981-02
影响因子：
2.6
通讯作者：
O. Koefoed
中科院分区：
文献类型：
--
作者：
O. Koefoed
提出了地震信号的垂直分辨力受三个方面的控制：中心瓣宽度、旁瓣比和侧尾振荡。覆盖相同频率范围的零相位信号的比较研究表明，这些方面中的任何一个方面的改善不可避免地导致其他方面之一的恶化。提出了一种无侧尾振荡零相位信号的解析仿真模型，该模型的中心瓣宽度和旁瓣比均可调。该模型的频谱分析表明，虽然频谱的高频内容对于获得小宽度的中心瓣是必不可少的，但是频谱的低频内容在导致旁瓣比的低值方面起着重要作用。
It is proposed that the vertical resolving power of a seismic signal is controlled by three aspects: the width of the central lobe, the side lobe ratio, and the side-tail oscillations. A comparative study of zero-phase signals covering the same frequency range shows that improvement of any one of these aspects inevitably leads to deterioration of one of the other aspects. An analytical simulation model is proposed of zero-phase signals free from side-tail oscillations, in which both the width of the central lobe and the side lobe ratio are adjustable. Analysis of the spectra of this model shows that, while the high frequency content of the spectrum is essential for obtaining a small width of the central lobe, the low frequency content of the spectrum plays an essential part in causing a low value of the side lobe ratio.