| 多波束测深数据中系统偏差改正方法研究——以 2003 年 SeaBat900X 东海调查数据为例 |
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| 引用本文： | 李劭禹,卜宪海,胡浩,李守军,赵春霞.多波束测深数据中系统偏差改正方法研究——以 2003 年 SeaBat900X 东海调查数据为例[J].海洋通报,2018(5):522-528. |
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| 作者姓名： | 李劭禹 卜宪海 胡浩 李守军 赵春霞 |
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| 作者单位： | 山东科技大学 测绘科学与工程学院，山东 青岛 266590,山东科技大学 测绘科学与工程学院，山东 青岛 266590；海岛 （礁） 测绘技术国家测绘地理信息局重点实验室，山东 青岛 266590,山东科技大学 测绘科学与工程学院，山东 青岛 266590；海岛 （礁） 测绘技术国家测绘地理信息局重点实验室，山东 青岛 266591,国家海洋局第二海洋研究所，浙江 杭州 310012,山东科技大学 测绘科学与工程学院，山东 青岛 266590；海岛 （礁） 测绘技术国家测绘地理信息局重点实验室，山东 青岛 266591 |
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| 基金项目： | 国家重点研发计划 （2018YFF0212203；2017YFC1405006；2016YFB0501705；2016YFC1401210）；山东省重点研发计划项目（2018GHY115002） |
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| 摘 要： | 多波束测量过程中，受到多种因素的影响，不可避免地存在各种误差，其中系统某个部件出现故障也不少见，如换能器、行波管、大功率微波开关或表层声速仪等器件功能不正常，引起多波束每 ping (一个发射接收周期） 数据中部分固定波束号的测深结果发生系统性偏移，以 2003 年东海调查 SeaBat900X 数据为例，其在垂直航向正投影平面上出现类似“W”字型的系统误差。本文基于该批次数据，系统分析了该类型系统偏差成因及外观表现，针对性提出基于等均值-方差拟合模型的改正方法，首先对异常区域和正常区域分别拟合地形趋势线，统计其均值和方差；然后以正常区域为基准，对异常区域内数据进行压缩和移动；最后通过面积差法，对数据中存在的折射残差进行消除，从而有效去除“W”型残差。文中实测数据验证了本文算法的有效性和可行性，对多波束其他类型的测深系统偏差处理具有一定的参考意义。
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| 关 键 词： | 多波束系统偏差 改正方法 拟合线 压缩 |
| 收稿时间： | 2018/4/25 0:00:00 |
| 修稿时间： | 2018/6/26 0:00:00 |
Research on correction method of sounding residual error for multibeam:a casestudy with SeaBat900X data from the East China Sea in 2003 |
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| LI Shao-yu,BU Xian-hai,HU Hao,LI Shou-jun and ZHAO Chun-xia.Research on correction method of sounding residual error for multibeam:a casestudy with SeaBat900X data from the East China Sea in 2003[J].Marine Science Bulletin,2018(5):522-528. |
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| Authors: | LI Shao-yu BU Xian-hai HU Hao LI Shou-jun and ZHAO Chun-xia |
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| Institution: | College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China,College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China; Key Laboratory of Surveying and Mapping Technology on Island and Reef, National Administration of Surveying, Mapping and Geoinformation, Qingdao 266590, China,College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China; Key Laboratory of Surveying and Mapping Technology on Island and Reef, National Administration of Surveying, Mapping and Geoinformation, Qingdao 266591, China,The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China and College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China; Key Laboratory of Surveying and Mapping Technology on Island and Reef, National Administration of Surveying, Mapping and Geoinformation, Qingdao 266591, China |
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| Abstract: | Errors are unavoidable in the multibeam bathymetries because many affecting factors exist in the process of multibeam measurement. Among those, it is not uncommon that some component of the multibeam system malfunction, such as transducer, TWT, high power microwave switch or surface velocimeter, which will cause the systematic offset in some fixed beams of per ping (a transmitting and receiving period) . Taking the data collected by SeaBat900X in the East China Sea in 2003 as an example, the systematic error of the "W" pattern appears on the across-track plane. To solve this problem, this paper systematically analyzes the causes and appearance of the multibeam sounding errors caused by the equipment failures,and the correction method based on the equal mean variance fitting model is proposed. Firstly, the terrain trend lines are fitted to the abnormal region and the normal region, and the mean and variance are calculated. Then based on the normal area, the data in the abnormal area is compressed and moved. Finally, through the area difference method, the refraction residuals in the data are eliminated, thus the "W" type residual is effectively removed. The measured data in this paper verify the validity and feasibility of the algorithm, and it also has certain reference significance for the processing of the sounding error of the other failure types of the multibeam equipment. |
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| Keywords: | multibeam residual error correct method fitting line compression |
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