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Multi-offset GPR surveys for complex targets
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 9th International Congress of the Brazilian Geophysical Society, Sep 2005, cp-160-00248
Abstract
During the last twenty years Ground Penetrating Radar (GPR, georadar) has been successfully used to discover and map several subsurface structures. The mono-static georadar (one single antenna) is fast and inexpensive for these surveys. Often, in archaeological and geological investigations the structures can be very complex: ancient walls and debris in chaotic mixtures of sediments or fractures in rocks. These cases are difficult to interpret with conventional single-offset (SO) records because there is scattering and poor signal-to-noise (SN) ratio. The present paper shows how the GPR multi-offset (MO) technique can provide more information about complex targets and enhance weak reflections. We compare the multi-fold (MF) stack and the MO section to investigate which method gives the best performance.