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Ground-penetrating radar (GPR) is a geophysical method that is seeing increasing use for near-surface underground research and applications. To achieve the required depth and accuracy for the GPR measurement of underground structures, the effects of certain data acquisition and interpolation parameters should be considered. These parameters include antenna frequency, sample length, profile interval, trace interval, sampling interval and resolution of the mesh of grid. For example, when the profile interval is large, underground structures may not be identified with sufficient accuracy. By contrast, selecting a narrower profile interval will increase the accuracy but will also increase the acquisition cost and processing time. The main objective of this study is to determine the optimal profile and trace intervals and the optimal mesh of grid by analyzing the interpolation-induced effects of different profile and trace …