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- W2151563131 abstract "A simulation of freely-deployed active underwater beacons to estimate the tow path of a Synthetic Aperture Sonar (SAS) towfish is presented. Knowledge of the tow path allows the removal of motion induced blurring in the SAS images. The beacons sit on the seabed listening for acoustic chirps from the sonar and retransmit back in a different frequency band after a fixed time delay. After reconstruction the beacons appear in the SAS image as point-source targets, blurred by towfish motion, from which the tow-path can be determined by triangulation. The effect of reconstructing the continuous towfish motion as discrete along-track ‘hops’ is also investigated. Simulations of a towfish path with 20 cm sway amplitude and typical measurement timing errors show a significant improvement in image quality using two active beacons." @default.
- W2151563131 created "2016-06-24" @default.
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- W2151563131 date "2003-01-01" @default.
- W2151563131 modified "2023-09-26" @default.
- W2151563131 title "Acoustic Timing Simulation of Active Beacons for Measuring the Tow-Path of a Synthetic Aperture Sonar" @default.
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