Abstract
Ground penetrating radar (GPR) is one of several non-destructive evaluation (NDE) methods for buried utilities that has been proposed and tested over the last couple of decades. This enables configuring a test system that can evaluate buried objects with a minimal disruption to environmental medium. Evanescent electromagnetic waves are inhomogeneous compounds of the near field, bound to the surface of the scattering object. These modes travel along the illuminated sample surface and exponentially decrease outside it, either in the form of lateral waves created by total internal reflection at dielectric flat interfaces and particles in metallic corrugated interfaces. One advantages of GPR is that it is able to analyze a buried object rapidly without having to contact the ground and measures the time interval between the generation of the impulse and its reception after the scattering, the results being presented in B-scan representation. This paper to present the results from a GPR survey at the scanning of a region containing a sewer pipe with unknown precise location that passes under a storage tank.
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