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Spectral Balancing GPR Data Using Time-variant Bandwidth in t-f Domain
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Near Surface 2008 - 14th EAGE European Meeting of Environmental and Engineering Geophysics, Sep 2008, cp-64-00057
- ISBN: 978-90-73781-56-6
Abstract
A deterministic method to increase vertical resolution of GPR data is proposed, based on spectral balancing in t-f domain. Taking advantage of the variation of time and frequency resolution of S-transform, GPR signals can be balanced and de-noised after the selection of a time-variant bandwidth. The algorithm is fast, since it involves one FT and two IFTs for each trace. The proposed methodology was applied on a synthetic trace and real GPR data from a sandbox experiment, revealing reflections, which were not clearly visible after conventional processing. Additionally, weak reflections present in the spectrally balanced GPR section, are attributed to the interface between the water - oil mixture zone and the water zone.