Abstract:Under the foundation of shortest path raytracing,inspired by the dynamic network shortestpath ray tracing,we derive the formulation of par-abolic traveltime interpolation and propose theshortest path ray tracing based on parabolic travel-time interpolation. The kernel of the method isthat we calculate time of one node not only usingDijstra algorithm but also by parabolic traveltimeinterpolation at the interpolation segment formedby the nodes with computed time.Then we takethe minimum traveltime as the final time of thenode.After that,the backward ray path tracingfrom the receiver point to the shot point is per-formed by parabolic traveltime interpolating.Mod-e1 data tests prove the accuracy,validity and appli-cability of the method.