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Utility of dispersion measurement for ground penetrating radar

Ground penetrating radar (GPR) is a nondestructive measurement technique, which utilizes electromagnetic waves to locate targets, anomalies, or interfaces buried under Earth or artificial materials. Normally, GPR’s are operated on the ground surface in reflection mode, which means that the reflected signals are used to identify buried objects. The basic premise of this operation is that the reflected signals are replicas of the transmitted signals with smaller amplitudes. However, dispersion (frequency-dependent wave velocity) is present in real materials and makes this assumption invalid. Rather than treating dispersion as an obstacle, the goal of this project is to use dispersion and possibly other wave properties such as phase shift and frequency-dependent attenuation to gain additional information about the target of interest. Once these properties are fully explored and understood, a new type of GPR can be designed for better survey quality.