Robust refraction tomography

Summary Refraction tomography is a popular tool for near-surface velocity model construction and statics estimation. However, tomographic results are usually more sensitive to the initial model and pick quality than solutions of delaytime methods. An alternative refraction tomography approach, presented in this paper, is robust since it does not require an initial model or explicit ray tracing. The technique is based on a local form of the Herglotz-Wiechert transformation. A field data example demonstrates the robustness of the new technique.