Browsing by Author "Fernandes, W.A."
Now showing items 21-28 of 28
-
Mapping and analyses of two coralline banks in the western continental margin of India using multibeam echosounder data
Menezes, A.A.A.; Mahender, K.; Chakraborty, B.; Fernandes, W.A.; Vardhan, Y.V.; Kurian, J. (NISCAIR-CSIR, India, 2018)Six and eleven profiles of bathymetric and backscatter data are drawn from the gridded (rasterized) maps of the two banks, the Gaveshani Bank and another, an unnamed bank (at latitude 13 0 43.5' N, longitude 73 0 42' E) ... -
Model-based seafloor characterization employing multi-beam angular backscatter data - A comparative study with dual-frequency single beam
Haris, K.; Chakraborty, B.; De, C.; Desai, R.G.P.; Fernandes, W.A. (Acoustical Society of America, 2011)Sediment geoacoustic inversion results are estimated employing a multi-beam (MB) echo-sounding system operable at 95 kHz. To characterize the western continental shelf of India (off Goa) seafloor, MB backscatter signals ... -
Morphology of pockmarks along the western continental margin of India: Employing multibeam bathymetry and backscatter data
Dandapath, S.; Chakraborty, B.; Karisiddaiah, S.M.; Menezes, A.A.A.; Ranade, G.; Fernandes, W.A.; Naik, D.K.; PrudhviRaju, K.N. (Elsevier, 2010)This study addresses the morphology of pockmarks along the western continental margin of India using multibeam bathymetry and backscatter data. Here, for the first time we have utilized the application of ArcGIS (Geographical ... -
Multi-beam backscatter image data processing techniques employed to EM 1002 system
Fernandes, W.A.; Chakraborty, B. (CUSAT, 2009)Application of multi-beam bathymetric data provides interesting seafloor features. Besides obtaining bathymetric data for seabed characterization backscatter data is also important. However, use of raw multi-beam backscatter ... -
Multifractal detrended fluctuation analysis to characterize phase couplings in seahorse (Hippocampus kuda) feeding clicks.
Haris, K.; Chakraborty, B.; Menezes, A.A.A.; Sreepada, R.A.; Fernandes, W.A. (Acoustical Society of America, 2014)Nonlinear phenomena in animal vocalizations fundamentally includes known features, namely, frequency jump, subharmonics, biphonation, and deterministic chaos. In the present study, the multifractal detrended fluctuation ... -
Multifractal detrended fluctuation analysis to compare coral bank and seafloor seepage area-related characterization along the central Western continental margin of India
Chakraborty, B.; VishnuVardhan, Y.; Haris, K.; Menezes, A.A.A.; Karisiddaiah, S.M.; Fernandes, W.A.; Kurian, J. (IEEE, 2016)In this letter, the characterization of two coral banks is initiated employing the multifractal detrended fluctuation analysis (MFDFA) for multibeam bathymetry and associated backscatter data. The seafloor roughness was ... -
Passive acoustic metrics to understand shallow water biodiversity off Malvan area in the west coast of India
Chanda, K.; Chakraborty, B.; Vardhan, Y.V.; Gracias, D.; Mahanty, M.M.; Latha, G.; Fernandes, W.A.; Chaubey, A.K. (NISCAIR, 2020)Underwater soundscape monitoring is an effective method to understand the biodiversity of an ecosystem. In this context, quantitative characterization of shallow water soundscape of the Burnt Island located off Malvan area ... -
Seafloor micro-roughness, benthic macro-fauna, and sediment substrate: A study of their interrelationship using high-frequency echo-sounding systems
Haris, K.; Chakraborty, B.; Menezes, A.A.A.; Fernandes, W.A.; Naik, M. (CSIR-NISCAIR, 2015)The spatial variability of sediment geoacoustic inversion results, derived from dual-frequency single-beam (SBES) and multi-beam echosounder system (MBES) operable at 33/210 kHz and 95 kHz, respectively, have been analyzed ...