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《应用地球物理(英文版)》 2011-04
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Accuracy analysis of the optimal separable approximation method of one-way wave migration

Du Shu-Yuan 1,2 , Chen Jing-Bo 2 , and Liu Hong 2 1. Graduate University Chinese Academy of Sciences, Beijing 100049, China. 2. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, CAS, Beijing 100029, China.  
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.
【Fund】: sponsored by the National Natural Science Foundation of China (Nos. 40774069 and 40974074);; the State Key Program of National Natural Science of China (No. 40830424);; the National 973program (No. 007209603)
【CateGory Index】: P631.4
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