A Coastal Acoustic Tomography Inverse Method Based on Legendre Polynomials and Its Application in Sanmen Bay Field Experiment,China
seven sets of shelf-contained type coastal acoustic tomography systems (CATs) were successfully deployed in Sammen Bay near the Taizhou city, China, during September 6 to 9, 2009 to measure tidal current structures at 3-min interval. An inverse model based on Legendre polynomials and Tikhonov regularization technology is developed to reconstruct the tidal current distributions using travel time differences obtained from the reciprocal sound transmission between the paired CAT stations. Variation of tidal current fields from food tide to ebb tide and tidal vortexes are well reconstructed. The horizontal distributions of tidal current obtained from the inverse analysis are in good agreement with that of Acoustic Doppler current Profiler (ADCP) observation and FVCOM ocean model. Comparison between CAT inversion and FVCOM model results, the spatial averaged mean square deviation (RMSD) is about 0.09 m/s for the eastward current and 0.04 m/s for the northward current, respectively. The time average RMSD between CAT inversion and ADCP measurement is 0.09 m/s for eastward current component and 0.002 m/s for northward current component, respectively. The investigation suggests that the coastal acoustic tomography inverse method based on Legendre polynomials is a promising alternative method for the ocean acoustic tomography inverse problem.
coastal acoustic tomography inverse method Legendre polynomial Sanmen Bay FVCOM ocean model tides
Guanghong Liao Jun Wang Xiaohua Xu Chenghao Yang Qingsong Wu Chuanzheng Zhang Xiaohua Zhu
State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography, SO A State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography, SO A State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography, SO A
国际会议
2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)
上海
英文
2581-2585
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）