Browsing Scholarly literature by Author "Schenke, H.W."
Now showing items 1-11 of 11
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A note on the morphology and tectonics of Kainan Maru Seamount, East Antarctica
Kodagali, V.N.; Hagen, R.; Schenke, H.W. (Taylor and Francis, 1998)Kainan Maru Seamount lies off the northern end of the Gunnerus Ridge along the margin of East Antarctica. The seamount is separated from the Gunnerus Ridge by only about 15 km. Detailed Hydrosweep multibeam surveys of the ... -
Analysis of multibeam-hydrosweep echo peaks for seabed characterisation
Chakraborty, B.; Schenke, H.W.; Kodagali, V.N.; Hagen, R. (Springer, 2001)Echo-peak data of outer and normal incidence beams from five different Southern Ocean bottom topographic regions have been analysed. The Rice and Extremal probability density function (PDF) statistical approaches reveal ... -
Arc arrays: studies of high resolution techniques for multibeam bathymetric applications
Chakraborty, B.; Schenke, H.W. (Elsevier, 1995)In this paper a theoretical study is initiated to observe the utility of directional spectral estimation techniques for `arc array' geometries. We examine the suitability of a 15 degrees arc transducer geometry for multibeam ... -
Backscatter data from the hydrosweep multibeam system: First results
Hagen, R.A.; Chakraborty, B.; Schenke, H.W. (German Hydrographic Society, 1994) -
Determining seabed backscatter parameters using Multibeam-Hydrosweep System
Chakraborty, B.; Hagen, R.; Schenke, H.W. (Crete University Press, Crete, 1996) -
Estimating deep seafloor interface and volume roughness parameters using the multibeam-hydrosweep system
Chakraborty, B.; Schenke, H.W.; Kodagali, V.N.; Hagen, R. (Taylor & Francis, 2002)Utilizing a hull-mounted, multinarrow beam echosounder onboard RV Polarstern, variation of acoustic backscatter with incidence angles at two different sites in the Southern Oceans (Agulhas Plateau and the Riiser Larsen ... -
Preliminary backscatter results from the hydrosweep multibeam system
Hagen, R.A.; Chakraborty, B.; Schenke, H.W. (MTS, Washington, USA, 1994)The alfred Wegener Institute recently contracted with Atlas Elektronik to upgrade the Hydrosweep multibeam bathymetry system on the polar research vessel POLARSTERN. This upgrade not only increased the swath width of the ... -
Pseudo sidescan images from backscatter amplitude data of the Hydrosweep multibean sonar system
Kodagali, V.N.; Hagen, R.; Schenke, H.W. (NISCAIR, CSIR, 1997)Using the rms (root mean square) backscatter amplitude values, a procedure was evolved to generate pseudo sidescan images. A comparison of the pseudo sidescan image with actual Hydrosweep sidescan image, from an area ... -
Seabottom characterization using multibeam echosounder angular backscatter: An application of the composite roughness theory
Chakraborty, B.; Schenke, H.W.; Kodagali, V.N.; Hagen, R. (IEEE, 2000)Composite roughness theory is used to characterize Southern Ocean bottom backscatter (multibeam) data. Spectral parameters based on Helmholtz-Kirchhof's theory (1) are determined from measured near-normal incidence values. ... -
Seafloor classification of the mound and channel provinces of the Porcupine Seabight: An application of the multibeam angular backscatter data
Beyer, A.; Chakraborty, B.; Schenke, H.W. (Springer, 2007)In this study multibeam angular backscatter data acquired in the eastern slope of the Porcupine Seabight are analysed. Processing of the angular backscatter data using the ‘NRGCOR’ software was made for 29 locations ... -
Studies of high resolution array processing algorithms for multibeam bathymetric applications
Chakraborty, B.; Schenke, H.W. (MTS, Washington, USA, 1994)In this paper a study is initiated to observe the usefulness of directional spectral estimation techniques for underwater bathymetric applications. High resolution techniques like the Maximum Likelihood (ML) method and the ...