Bidirectional Angle Limited Shortest Path Ray Tracing in Complex Topographical Conditions

Abstract

Ray tracing technology in complex topographical conditions has an important influence on mountain velocity modeling and migration imaging. In order to realize the stable and high precision ray tracing in the conditions, the bidirectional angle limited shortest path ray tracing method with under the condition of irregular calculation boundary is proposed. Firstly, based on the shortest path ray-tracing method, a new algorithm of local traveltime is given under the condition of bidirectional angle limited. Secondly, combining this algorithm with narrowband technology, a ray-tracing algorithm is proposed to adapt to arbitrary complex terrain; Then, we compare the accuracy of this method and the first-order finite-difference method; Finally, the adaptability and stability of the complex surface are verified by the calculation example, and the corresponding conclusions are given.