ABSTRACT
In geophysical measurements, focus is taken to mean that the shape of a buried object is somehow 'recovered' either directly in the acquired data or in its subsequent manipulation. There are several important differences between the tomographic imaging introduced thus far and that which must be used in geotomography. It is obvious that light cannot be used to probe the Earth's subsurface. Ground Penetrating Radar (GPR) typically employs a single source and a single receiver while acoustic measurements are typically array-based, in other words, many receivers are used. This difference is driven by equipment costs. For the common GPR measurement geometry, there will be normal incidence when the reflecting surfaces are planar such as a horizontal or a gently sloping interface. While radar is more time-efficient for reflection studies, it is less time-efficient than acoustic methods in geotomography because transmitter and receiver must be moved individually.
