浅水多波束勘测数据精细处理方法  

The Methods of High Quality Post-Processing for Shallow Multibeam Data

作　　者：阳凡林[1,2] 李家彪[1] 吴自银[1] 金翔龙[1] 初凤友[1] 

机构地区：[1]国家海洋局海底科学重点实验室,浙江杭州310012 [2]山东科技大学基础地理信息与数字化重点实验室,山东青岛266510

出　　处：《测绘学报》2008年第4期444-450,457,共8页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金项目(4050602340506017);山东省泰山学者建设工程专项经费项目(TSXZ0502)

摘　　要：系统分析多波束勘测水深的误差表现,针对性地提出相应的改正措施,首先去掉勘测质量差的重复覆盖条带,改正横摇校准残差,然后根据提出的浅水常梯度声速模型,搜索确定模型参数,以此模型参数及波束到达角和旅行时对每个波束重新进行归位计算,接着自动删除多余边缘波束,最后网格化水深数据并以对应的波束号确定中央和边缘波束位置,对格网中边缘波束进行强制微调,得到光滑的格网水深数据。从实测数据结果来看,本文算法物理意义明确、切实可行、后处理速度较快,改正结果较理想。In this paper, we analyzed the errors in muhibearn bathymetry in detail. According to different sources, we use corresponding algorithms to correct depth errors. Firstly. the low quality swaths and outliers are removed, Then a reduced and equivalent sound speed profile modcl is presented. The model parameters can be searched under the principles of the minimum difference betwcen the overlap sites of two neighhoring swaths. Then the horizontal position and depth of each beam can be recalculated through the model parameters. And then the redundant edge beams are automatically delctcted. Finally, the grid depths are finely adjusted according to the differences of neighboring edge beam and are processed by a low-pass fihcr. Wewill get a smooth seafloor terrain image after these procedures are finished. Thc method is verified by the real data.

关 键 词：多波束声纳 声速剖面 折射 假象 

分 类 号：P229.3[天文地球—大地测量学与测量工程]