Array tilt effect induced by tidal currents in the northeastern East China Sea

OCEAN ENGINEERING

卷:194

Article

Park, Jungyong¹  Seong, Woojae^2,3  Yang, Haesang^2,3  Nam, SungHyun^4,5  Lee, Seung-Woo⁴ 

[1] Agcy Def Dev, POB 18, Chang Won 51678, Gyeongsangnamdo, South Korea

[2] Seoul Natl Univ, Dept Naval Architecture & Ocean Engn, Seoul 08826, South Korea

[3] Seoul Natl Univ, Res Inst Marine Syst Engn, Seoul 08826, South Korea

[4] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 08826, South Korea

[5] Seoul Natl Univ, Res Inst Oceanog, Seoul 08826, South Korea

关键词: Arrival structure;    Channel impulse response;    Tidal current;    SAVEX-15;   

DOI  :  10.1016/j.oceaneng.2019.106654

来源: Elsevier

【 摘 要 】

The relation between the tidal current and the acoustic signal measured at vertical line arrays (VLAs) is investigated from data of the shallow-water acoustic variability experiment 2015 performed in the northeastern East China Sea. From the channel impulse response, the arrival structure measured on the VLA was observed to vary with semidiurnal tidal period. To explain this phenomenon, the direction of the array tilt is assumed to be consistent with the current flow direction. The modeling results based on ray tracing prove the relation between the variation of the arrival structure and array tilt angle in a time-varying form, yielding an estimation of tidal currents in the region. We compared the projected time series of horizontal currents to the acoustic paths with the curvature variation in the arrival structure to validate our results and confirmed that they are consistent with each other.

【 授权许可】

Free