Abstract

The accuracy of a seafloor map derived from multibeam swath bathymetry depends first and foremost on the quality of the bottom detection process that yields estimates of the arrival time and angle of bottom echoes received in each beam. Filtering of each beam with a fixed bandwidth filter, with the bandwidth based on the length of the transmitted pulse, reduces the error associated with the time-angle estimates. However, filters of this type can not be optimal over the wide range of operational environments encountered. Better results are obtained with a processing scheme that varies the filter bandwidth across the swath width using detected time and angle information from the previous ping. This method is evaluated using sonar data obtained with a Reson SeaBat 8111ER and the results compared with those obtained using a fixed bandwidth filter.

Publication Date

11-2004

Journal or Conference Title

IEEE Oceans

Volume

2

Pages

1154-1158

Conference Date

Nov 9 - Nov 12, 2004

Publisher Place

Kobe, Japan

Publisher

IEEE

Digital Object Identifier (DOI)

10.1109/OCEANS.2004.1405672

Document Type

Conference Proceeding

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