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Ray-Tracing of Wavefront Construction by Bicubic Convolution Interpolation

HAN Fu-xing1,2,SUN Jian-guo1,2,YANG Hao1,21.College of GeoExploration Science and Technology,Jilin University,Changchun 130026,China2.Laboratory for Integrated Geophysical Interpretation Theory,Ministry for Land and Resources,Changchun 130026,China  
To overcome the problems of the interpolation of the velocity and velocity derivative on non-grid during wavefront construction,a more accurate interpolation algorithm,called bicubic convolution interpolation,has been presented.Numerical results show that the interpolation method can get more accurate rays.And comparing with the double 3-order polynomial interpolation method,the velocity and velocity derivative on non-grid in wavefront construction can be computed more accurate and faster by the bicubic interpolation method.
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