利用倾角分解法实现转换波DMO

目前使用的频率－波数域转换波ＤＭＯ方法，理论上存在因二介近似的截断误差而造成在运动学方面产生较大误差。为了提高转换波ＤＭＯ的处理精度和效率，本文从倾角分解观点出发，给出一种频率－波数域转换Ｐ－ＳＶ波的ＤＭＯ方法。该方法可克服二阶近似带来的误差，还可避免求解高次方程的根。与现有的频率－波数域转换波ＤＭＯ方法相比，具有简便，高效，精度高等特点，理论模型试算的结果表明，倾角分数法ＤＭＯ是一种较为理想的转

Converted-wave DMO using inclination decomposition

The existing methods for converted-wave DMO in frequency wavenumber domain have quite big kinematic errors due to approximate two order truncation er-rors. in order to improve converted-wave DMO ,we advance a new P-SV wave DMOmethod in frequency wavenumber domain which is based on inclination decomposi-tion. This new method eliminates error resulting from two-order approximation andavoids solving a higher degree equation. It is more convenient,effective and accuratethan the existing converted-wave DMO methods in frequency-wavenumber domain.Theoretical modeling result indicates that the inclination-decomposition DMOmethod is a desirable converted-wave DMO method.