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A nonlinear method of removing harmonic noise in geophysical data

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Figure

Fig. 1. Process of sifting.extracted from a typical GPR record acquired in the field.inal datathe two envelopes.between the original data and (a) The original single trace data g(t) (b) Orig- g(t) with upper and lower envelopes and the mean m1 of (c) The fir
Fig. 2. Simulation of the reflection model.added. (a) Shot gather model without harmonic noise
Fig. 4. Filter bank of the harmonic noise affected model data with logarithmic transform.
Fig. 5. Comparison of filtering results of the proposed method and other 2-D adaptive techniques to the model contaminated with harmonicnoise and ground roll
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