Effects of Towfish Motion on Sidescan Sonar Images: Extension to a Multiple-BeamDevice

摘要

A simulation algorithm previously used to estimate the geometrical effects oftowfish motion on single-beam sidescan sonar images is modified to simulate a multiple-beam sidescan sonar. The parameters of the sidescan sonar model are based on those announced for the Multiscan sonar soon to be manufactured by Klein Associates Inc. The results of simulations using the algorithm are discussed and compared with previous results for a single-beam device. The thresholds for towfish motions producing unacceptable image distortion are found to be similar to those found for the single-beam device. The image distortions induced by the motions are however found to be qualitatively different from those seen with the single-beam sonar. The effects of and limitations to a simple yaw-correction scheme are also discussed. MBEAM, Sidescan sonar images, Towfish motion, Sonar beams.