240-kHz bistatic bottom scattering measurements in shallow water

Author

Choi, Jee Woong ; Na, Jungyul ; Seong, Woojae

Author_Institution

Dept. of Earth & Marine Sci., Hanyang Univ., Ansan, South Korea

Volume

26

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

54

Lastpage

62

Abstract

High-frequency bistatic sediment scattering experiment was conducted in the shallow waters off the east coasts of Korea. Acoustic data were taken as a function of grazing angle (30°, 45°, and 60°), scattered angle (30°, 45°, and 60°), and bistatic (azimuthal) angle (0°, 60°, and 120°). Besides a flat bottom it was artificially raked so as to produce directional ripples. The measured scattering strengths for a flat bottom were compared to model predictions of D.R. Jackson et al. (1986). The surface reverberation component is seen to dominate over the volume scattering part at the frequency of 240 kHz. Compared to the flat bottom case, the scattering strengths for directional ripples showed lower and higher variation depending on the ripple´s orientation

Keywords

oceanographic techniques; reverberation; seafloor phenomena; sediments; sonar; ultrasonic scattering; underwater acoustic propagation; 240 kHz; HF bistatic sediment scattering; azimuthal angle; bistatic bottom scattering measurements; bottom roughness orientation; directional ripples; flat bottom; grazing angle; model comparison; scattered angle; shallow water; surface reverberation component; volume scattering part; Acoustic measurements; Acoustic scattering; Frequency; Reverberation; Rough surfaces; Sea measurements; Sea surface; Sediments; Sonar detection; Surface roughness;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/48.917926

Filename

917926