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GPR Modeling for Rapid Characterization of Layered Media

By Subrata Maiti, Sarat Kumar Patra, and Amitabha Bhattacharya
Progress In Electromagnetics Research B, Vol. 63, 217-232, 2015


The success of a ground penetrating radar (GPR) signal modeling scheme largely depends on its accuracy and computational efficiency. Most of the modeling schemes suffer from inaccuracy because of unrealistic assumptions of complex GPR environment. In this respect full wave model (FWM) of GPR signal is a promising approach for accurate characterization of multi-layered media. However, large computation time of FWM compared to other simplified models makes the approach inefficient for real time application. In this work an FWM scheme is developed based on electric field equivalent magnetic current density at antenna phase center. The compact analytical expression of Green's function representing response due to layered media is derived. Then a plane wave model (PWM) is proposed by introducing a spreading factor based on simplified expression of the FWM. The model inversion is successfuly carried out by a gradient based algorithm. A stepped frequency continuous wave GPR in off-ground monostatic configuration is implemented in laboratory environment to verify performances of the models. Experimental analysis proves that the proposed PWM is as accurate as FWM, and its computation efficiency is enormous to detect layered media parameters.


Subrata Maiti, Sarat Kumar Patra, and Amitabha Bhattacharya, "GPR Modeling for Rapid Characterization of Layered Media," Progress In Electromagnetics Research B, Vol. 63, 217-232, 2015.


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