Title: The influence of vessel attitude on spatial-temporal correlation of sea-bottom reverberation

Author(s): YAN Shanyong; QIU Wei; ZHAO Erliang; WANG Changhong;

Affiliation(s): Ocean Acoustic Technology Center, Institute of Acoustics, CAS, et al.

Abstract: The influence of vessel attitude on spatial-temporal correlation of sea-bottom reverberation is discussed. The theoretical correlation function is deduced in consideration of the attitude of vessel. The relationship of the spatial-temporal correlation and the vessel attitude is obtained: The greater the sway of the vessel on some direction is, the faster the correlation coefficient decreases on the direction. The theoretical correlation function agrees well with the simulation result when sea-bottom has no large-scale relief but has isotropic roughness. The actual sea-bottom usually has large-scale relief and anisotropic roughness, so the vessel attitude and the large-scale relief cannot determine the shape of the correlation function, but trial data has proved their combined influence. In addition, the influence of the vessel attitude on the measurement of vertical velocity is discussed.