global Travel time table for a homogeneous velocity model Travel-time interface for homogeneous velocity models. Parameters defining the area where the profile applies and the P/S velocities. Once defined, the profile can then be registered in ttt.homogeneous.tables Geographic origin of the region. Expects 2 values: latitude, longitude. Radius validity of the region. Min Depth validity of the region. Max Depth validity of the region. P wave velocity. S wave velocity.