多波束海底地形畸变校正与声速剖面反演

Inversion of Sound Velocity Profiles by Correcting the Terrain Distortion

摘要: 提出了一种多波束测量声速剖面反演方法。即采用EOF(empirical orthogonal function)算法,对测区实测声速剖面数据进行模态向量提取,以多波束测量声速改正不完善引起的地形畸变程度为依据构造适应度函数,通过遗传算法优化声速剖面的重构系数,实现声速剖面反演。实验结果表明,反演的声速剖面能有效改正声速误差引起的海底地形失真,显著提高了多波束水深测量数据精度和处理效率。

Abstract: In this paper, mode vectors via EOF (empirical orthogonal function) are obtained based on real sound velocity profiles; by correcting the terrain distortion, the reconstruction coefficients of sound velocity profile are determined by GA (genetic algorithm) and then the inversion result of sound velocity profile is obtained. Results show that terrain distortion caused by the sound velocity errors can be effectively corrected by the inversion result of sound velocity profiles. Meanwhile, the accuracy and processing efficiency of multi-beam bathymetry data was significantly improved.