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《Computing Techniques for Geophysical and Geochemical Exploration》 1993-02
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A PRECISE RAY METHOD IN TOMOGRAPHY AND ITS APPLICATIONS

Zhao Mingjie (Nanjiang Hydro Engineering Geology Brigade,SCGB) Zhu Jieshou (Chengdu College of Geology)  
This paper proposed a crosshole tomographic method using precise ray-tracing in complex medium,The block model is described by local linear function of mode for cell velocity distribution,and precise inversion formula corresponding with forward calculation was given. It was not only avoid the disagreement between model parameters and inversion parameters but also soluted dismatch problem on forward and inversion in traditional curve ray-tracing. In order to make forward calculation fast, an improved shot-method was used in two-point problem. The numerical and practical application results show that the proposed precise ray method is fast, stable, reliable and applicable.
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