Determination of nodule coverage parameters using multibeam normal incidence echo characteristics: A study in the Indian Ocean

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dc.contributor.author Chakraborty, B.
dc.contributor.author Pathak, D.
dc.contributor.author Sudhakar, M.
dc.contributor.author Raju, Y.S.N.
dc.date.accessioned 2009-01-12T09:18:26Z
dc.date.available 2009-01-12T09:18:26Z
dc.date.issued 1997
dc.identifier.citation Marine Georesources and Geotechnology, Vol.15; 33-48p.
dc.identifier.uri http://drs.nio.org/drs/handle/2264/2060
dc.description.abstract A study of the echo peak amplitudes from known nodule areas is initiated to observe the acoustic response for varying nodule abundances and number densities. A statistical study of the peak amplitudes from different nodule areas confirms that the coefficient of variation is the highest for medium nodule abundance and number density. Echo fluctuation study based on the Rician probability density function (PDF) establishes that the non-nodule sediment bottom contributes to less scattering i.e., it is a microtopographic type, whereas scattering is dominant in the nodule-bearing areas. The spectral studies are conducted on depth data of different areas. this study ensures that the signal scattering int he nodule bottom area is due to the nodules lying on the seabed rather than the large/small-scale topographic variations. The study based on Poisson PDF for nodule area confirms this fact again. Agreement between the nodule distribution and the Poisson distribution parameter is clearly seen. Such a relation is not observed in the case of Rician density functions
dc.language.iso en
dc.publisher Taylor and Francis
dc.rights Copyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subject echo surveys
dc.subject sonar
dc.subject amplitude
dc.subject nodules
dc.subject abundance
dc.subject distribution
dc.subject correlation analysis
dc.title Determination of nodule coverage parameters using multibeam normal incidence echo characteristics: A study in the Indian Ocean
dc.type Journal Article


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