Incorporating Head Waves and Diving Waves in Refraction Tomography

A-37 INCORPORATING HEAD WAVES AND DIVING WAVES IN REFRACTION TOMOGRAPHY Summary 1 Refraction methods are usually divided into two categories: head-wave and diving-wave based. By choosing one of these methods one assumes first arrivals to be the onset of a certain wave type. However the decision on which assumption is better for a particular survey is seldom obvious as it implies the knowledge of a model type. This dilemma may be resolved by tau-p refraction tomography which is an emerging technology that complements other well-known methods for modeling the near surface. This method builds the near-surface model from the tau-p