【摘要】 作为一种模拟地震波走时的传统途径,射线追踪不仅对地震波理论研究具有重要意义,而且也可直接应用于地震波反演及偏移成像等过程。在一般条件下,射线追踪只能用数值方法来实现,但当介质上具有垂向不均匀性时,射线路径及其走时可以由解析式给出。根据适当的解析公式,可建立反射点和射线路径以及走时之间的关系,并用VC++6.0编制了基于图形界面的计算程序。这些工作对于逐步开发地震波的偏移和反偏移程序具有基础性的意义。更多还原

【Abstract】 As a traditional way for computing the traveltimes of seismic waves, ray tracing is significant not only for forward investigations, but also for inversion and migration. In general, ray tracing can only be realized by numerical method. However, when the considered medium is inhomogeneous only in vertical, the ray paths and the isochrones can be described by analytical expressions. Based on the expressions, we establish the equations and formulas for reflection points and isochrones. Also, we develop a graphic-interface program using VC⁺⁺6.0 to display the ray paths and the isochrones. What we have done gives a basis for future research in migration and demigration.更多还原