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dc.contributor.authorDe, Ch.
dc.contributor.authorChakraborty, B.
dc.date.accessioned2011-10-10T03:41:10Z
dc.date.available2011-10-10T03:41:10Z
dc.date.issued2011
dc.identifier.citationIEEE Transactions on Geoscience and Remote Sensing, vol.49; 2011; 3868-3877
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/3928
dc.description.abstractThe characterization of seafloor sediments by acoustic means is carried out using normal-incidence, dual-frequency, single-beam echo sounder backscatter data at 20 locations in the western continental shelf of India. A temporal backscatter model for a finite duration of transmitted signal is used to estimate the values of four sediment parameters through inversion - mean grain size, roughness spectrum strength, roughness spectrum exponent, and sediment volume scattering parameter. Ground truth information on sediment mean grain sizes at these locations is obtained from the laboratory analysis of grab samples. Applicability of the temporal backscatter model over different sediment compositions at 33 and 210 kHz is investigated here for characterizing the seafloor through inversion. Moreover, a combined two-frequency inversion approach has been attempted for improved characterization by estimating a single set of values for the aforementioned four sediment parameters, which is applicable to the backscatter data at both of the acoustic frequencies. A linear regression analysis demonstrates that the estimated values of sediment mean grain size obtained from these three inversion cases statistically agree with the ground truth data. In addition, correlations of the estimated values of seafloor roughness spectrum parameters with the values of sediment mean grain size are compared with published information available in the literature
dc.language.isoen
dc.publisherIEEE
dc.rights© 2009 IEEE "This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder."
dc.subjectacoustic imagery
dc.subjectbackscatter
dc.subjectinversions
dc.subjectbed roughness
dc.titleModel-based acoustic remote sensing of seafloor characteristics
dc.typeJournal Article


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