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Locate mode processing for hand-held land mine detection

Landmine detection using hand-held GPR unit has two modes of operation: search mode and locate mode. Search mode generates an initial detection at a suspected location and locate mode affirms that the suspected location contains a land mine. Search mode requires causal processing and has a high false alarm rate. Locate mode allows the operator to interrogate the suspected location to eliminate false alarms and does not require causal processing. This paper proposes an algorithm for locate mode processing. The proposed method uses the consistency of detection as well as the shape of detection peaks over several sweeps to improve the detection accuracy. The proposed algorithm was examined through a data set collected at a test site, and was compared with the performance when taking the maximum of detection values over several sweeps. Experimental results showed that the proposed method reduces the probability of false alarm by more than 70% at 100% correct detection rate.