Suppressing Reflected Guided Waves From Contaminated Borehole Radar Data

摘要: In borehole radar (BHR) surveys, if the is either suspended by a conductive communication cable or run in water, guided waves may be induced. When they encounter impedance changes, for example, at geological interfaces, will reflected. These reflected (RGWs) often are relatively strong. They present themselves as obliquely striped patterns B-scan image, and, severely contaminate reflections of interest. this letter, we compare three signal processing methods to suppress RGWs: 1) running moving average error filter along specified dip—as $\tau $ -p filtering; 2) pie-slice frequency–wavenumber (F-K) and 3) F-K migration-based filtering method. The third method novel. All based on characteristics generating mechanism RGWs. Real BHR data collected with monostatic system illustrate their relative effectiveness.