Ground Penetrating Radar (GPR) is a geophysical method increasingly used in numerous shallow applications.Unfortunately, electronic or acquisition problems can cause the presence in the radargrams of coherent noiseinterfering with the useful signal. A commonly observed phenomenon, especially for not-shielded antennae, is thesurface-scattering effect, due to reflection or diffraction from above-surface objects. These noise events appearwith a characteristic hyperbolic moveout in the usual common-offset sections. Other frequent problems are relatedto the presence of horizontal or dipping features due to system-ringing or other non-geological causes. Severalmethods have been tried to overcome these problems, most of which involve time domain or Fourier domainfiltering. This work presents an attempt to reduce some of these noise modes by an original adaptation of filteringtechniques implemented in the Radon domain. The Radon Transform (RT), both in the linear (or t-p) and in theparabolic version (or t-q), has been widely used in seismic processing, especially for multiple removal, but isstill quite unfamiliar to GPR practitioners. The results achieved by different RT based methods for coherent noiseattenuation in a GPR field example, compared to those of more conventional techniques, are quite encouraging.
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