Attenuation compensation for georadar data by Gabor deconvolution

Robert J. Ferguson and Gary F. Margrave

ABSTRACT

It has been shown through previous data examples that nonstationary deconvolution, and in particular the CREWES Gabor nonstationary deconvolution, provides significant enhancement for deep georadar reflections. In many examples the improvement extends the radar image from a few meters to a few tens of meters.

We find here through controlled experiment that nonstationary deconvolution has an attenuation correction property - the frequency and phase components of attenuation loss are compensated for. Though the compensation effect is noticeable on seismic data, the effect on georadar data is quite a bit more obvious and we find that, in terms of attenuation factor Q, Q is about an order of magnitude smaller (so the attenuation effect is much larger) for georadar than it is for seismic. We show that it this Q compensation probably accounts for the significant signal improvements that we see in georadar data.

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