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本文考虑了快速共偏移距“对数拉伸”DMO 公式的方法和意义,并指出两个众所周知的公式的缺陷是脉冲响应不保持 DMO 椭圆特性。本文给出的对数拉伸公式能保持 DMO椭圆特性,它在(ω,k)域表现为一乘法因子.最后,用野外数据对这四种共偏移距 DMO 方法—Hale 法和三个对数拉伸算法进行了试验.结果表明:其中只有一种对数拉伸算法能将浅部或大倾角同相轴正确归位。而其它两个对数拉伸算法则不能.
This paper considers the method and significance of the fast logarithmic offset “logarithmically stretching” DMO formula and points out that the drawback of the two well-known formulas is that the impulse response does not preserve the DMO ellipticity. The logarithmic stretching formula given in this paper can maintain the ellipticity of DMO, which shows as a multiplicative factor in the (ω, k) domain.Finally, we use the field data to analyze the four DMO methods - Hale method and three The experimental results of logarithmic stretching show that only one kind of logarithmic stretching algorithm can correctly locate the shallow or large dip events. The other two logarithm stretching algorithm can not.