Importance of Simulating Realistic Transducers in GPR Numerical Modelling
N. Diamanti, J.D. Redman and A.P. Annan
Event name: Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics
Session: GPR and Electromagnetics I
Publication date: 08 September 2014
Info: Extended abstract, PDF ( 668.79Kb )
Price: € 20
Ground penetrating radar (GPR) is a very powerful, non-destructive testing tool with a wide range of applications mainly associated with shallow depth exploration. The complexity of the subsurface leads to complicated GPR images and also, attempting to use experimental measurements to assess and simulate complex problems is costly and time consuming and often limited by availability of suitable materials. The latest advances in GPR modelling provide an effective means for assessing GPR responses and now GPR models are becoming fully three-dimensional and sophisticated. Representative models can require large amounts of computer power and memory with very long run times. On the other hand, modern computing capacity is increasing so rapidly that problems previously considered impractical can be modelled for real application projects. One of the trade-offs in numerical modelling is the rational of using point sources and receivers versus full antenna structure simulations since the former require less computer memory and computation time. In this paper, we explore the question: when is a detailed GPR antenna model needed and when do point sources suffice?