【摘 要】
：
An approximation for the one-way wave operator takes the form of separated space and wave-number variables and makes it possible to use the FFT,which results in
【机 构】
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Graduate University Chinese Academy of Sciences,Key Laboratory of Petroleum Resources Research
【基金项目】
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The paper is sponsored by the National Natural Science Foundation of China;the State Key Program of National Natural Science of China;the National 973program
论文部分内容阅读
An approximation for the one-way wave operator takes the form of separated space and wave-number variables and makes it possible to use the FFT,which results in a great improvement in the computational efficiency.From the function approximation perspective,the OSA method shares the same separable approximation format to the one-way wave operator as other separable approximation methods but it is the only global function approximation among these methods.This leads to a difference in the phase error curve,impulse response,and migration result from other separable approximation methods.The difference is that the OSA method has higher accuracy,and the sensitivity to the velocity variation declines with increasing order.
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