利用相邻测线重叠区域进行多波束测深横摇运动残差改正

针对多波束测深条带边缘波束易受到姿态和声速等多种误差影响、相对中央波束数据质量较低的问题，本文提出一种利用相邻测线重叠区域对多波束测深数据边缘波束进行横摇运动残差改正的模型，提高边缘波束测深数据的质量。使用沿航向的测深点匹配插值模型，完成中央波束测深点与边缘波束测深点的匹配，得到边缘波束测深误差值；使用横摇运动残差改正模型，实现顾及姿态角的条件下补偿波束入射角。计算实例表明：本文模型能够较为准确地提取边缘波束测深误差值，改正后的海底地形削弱了误差导致的上下起伏，有效地减少了影响边缘波束的多种误差，具有实际的工程应用价值。

Residual Correction of the Rolling Motion in Multibeam Bathymetry Using Overlapping Area of Adjacent Survey Lines

Given that the edge beam of the multibeam bathymetric strip is affected by various errors like motion errors and sound velocity profile bias and its data quality is poorer than that of the central beam, we have proposed a model to correct the rolling motion residual of the edge beam of multibeam bathymetry using the overlapping area of adjacent survey lines to improve data quality of them. Specifically, we employed the matching interpolation model of the bathymetry points along the heading to match the bathymetry points of the central beam with those of the edge beam, and obtained the bathymetric error value of the edge beam. Then, we adopted the residual correction model of the rolling motion to compensate for the beam incidence angle that considers the attitude angle. Finally, based on calculating the residuals of rolling motion, we analyzed and inverted the relationship between the residuals of rolling motion and the rolling data. The calculation results indicate that the proposed model can accurately extract the bathymetric error values of the edge beam, and the corrected seabed topography eliminates the undulation caused by errors, thus effectively weakening the impacts of various errors on the edge beam and providing valuable application references for practical engineering.