Some sea bottom backscattering models and estimation of their usefulness for empirical data analysis

• Autorzy: Nowak Ł.
• Języki publikacji: EN

Abstrakty

EN

The paper introduces two different methods of numerical computation of the time proceeding of low-frequency acoustic pulse reflected from layered sea bottom. The input of both mathematical models are time proceedings of known sampling pulses and parameters describing determined seabed structure. Parameters necessary for complete bottom description are number of sediment layers and mean grain size of specific type of sediment creating each layer. Two introduced approaches strongly differ from each other in complexity, computation time and domain, number of phenomenon taken into account in formal description of considered process. First of the presented methods is based on time analysis of sampling pulse propagation, second one treats the propagation media as a system characterized with given transmittance. The goal of introduced investigations is to estimate usefulness of results obtained with those two mathematical models for analysis empirical data gained using parametric echosounder for seabed structure examination.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2010
• Tom: Vol. 13
• Strony: 197--204
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Nowak Ł.

• Polish Naval Academy in Gdynia Śmidowicza 69, 91-103 Gdynia, Poland,

Bibliografia

• [1] Innomar Technologie GmbH, SES-2000 Narrow-beam parametric sub-bottom profilers, Innomar Technologie GmbH, Rostock, 2008.
• [2] Jackson D.R., Winebrenner D.P., Ishimaru A., Application of the composite roughness model to high-frequency bottom backscattering, Journal of Acoustical Society of America 79(5).
• [3] Salomon R., Systemy Hydrolokacyjne, Gdańskie Towarzystwo Naukowe, Gdańsk 2006.
• [4] Sternlicht D.D., de Moustier Ch.P., Time-dependent seafloor acoustic backscatter (10-100 kHz), Journal of Acoustical Society of America 114(5), 2003.
• [5] Tęgowski J., Akustyczna klasyfikacja osadów dennych, Instytut Oceanologii PAN, Sopot 2006.
• [6] Nowak Ł., Szymczak W., Investigation of the pulse reflected from bottom sediments, Hydroacoustics vol.12, Gdańsk 2009.