Rock structures analysis from GPR radargram based on MUSIC method

Ground Penetrating Radar (GPR) is a feasible remote sensing tool for surveying subsurface geo-structure. These structure characteristics are recorded in radar signal profiles by means of echo signal detection, amplitude and phase estimation. Besides the energy attenuation and absorption of GPR electromagnetic (EM) pulse during its propagating into subsurface from a transmitting antenna, the strong interferences such as multiples, background scatters, clutters and random noise often make the weak signal of structure signatures hardly distinguishable from them. This paper focuses on detecting rock fractures with multiple signal classification (MUSIC) under complex environment. By surveying data at experimental site it is shown that this method can efficiently achieve sparse representation of subsurface structures and yields discriminative fracture signature for geological interpretation.