Source ship contamination removal in a broadband vertical array experiment

Use of adaptive noise cancellation techniques to remove tow-ship contamination from array element time series is described. A broadband beam pointing at the tow ship was formed and used as the reference input to a least-squares lattice adaptive noise canceller. Each hydrophone time series (in turn) was treated as the primary input. The contamination-free individual element signals then were beamformed. The results indicate removal of the contaminating tow ship signature while preserving the broadband transmission from the towed source