The Sea Beam multibeam bathymetric system is in operation aboard research vessels worldwide. While it has contributed greatly in advancing the understanding of the deep-sea floor, several types of bathymetric artifacts have been identified in its contoured output which could be mistaken for sea floor structure. Among those the tunnel effect results from sidelobe interference caused by the near specular return and is most prominent when the sea floor is relatively flat. It is characterized by a through in the bottom profile produced by Seam Beam. It will be shown that this type of interference can be greatly reduced or eliminated through an adaptive filtering scheme, pending a minor modification of the Sea Beam data acquisition system. The noise-cancelling configuration of the adaptive least-squares lattice filter will be used to process simulated Sea Beam data obtained through REVGEN, a high-fidelity sonar system simulation program.
Sea beam sidelobe interference cancellation
Die Entzerrung von Seitenzipfeln in Strahlen-Nebenzipfeln
Ocean Engineering and the Environment. Conf. Record ; 1 ; 472-476
1985
5 Seiten, 7 Bilder, 10 Quellen
Conference paper
English