摘要
在河道水深测量作业中,测船姿态的变化将引起水深测量的测深误差和回波水深点的位置误差,在水深变化较大的复杂水域,这种误差将较大地影响测量精度。为提高使用河道水深测量的精度与可靠性,需在采用合适的模型进行测深改正和回波水深点的位置改正。考虑到河道水域水下水深变化的特点和水深测线布置的特性,提出了"相对纵摇"和"相对横摇"的概念,采用简单的计算模型即可以有效地减弱波束角效应与测船姿态耦合效应在河道陡坡水域测量中的影响。实例表明,基于波束角和姿态耦合效应计算出的测量成果比不考虑姿态和波束角改正或仅考虑姿态改正情况下,陡坡位置的综合精度分别提高了30%和20%左右。
In the work of river bathymetry, the change of ship attitude will cause the sounding error and position error of echo. And this error will greatly affect the measurement accuracy in the complex waters where the water depth varies greatly. In order to improve the accuracy and reliability of river bathymetry, it is necessary to adopt appropriate model to correct the sounding and the location of echo. Considering the characteristics of water depth variation and the layout of bathymetric line, the concepts of "relative pitch" and "relative roll" are proposed in this paper. A simple calculation model can effectively reduce the coupling effect of angular beam-width and ship attitude in the measurement of river with steep slope.
作者
吴敬文
盛青
黄金发
WU Jing-wen;SHENG Qing;HUANG Jing-fa(Changjiang River Estuary Bureau of Hydrology and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Commission,Shanghai 200136,China;Shanghai Engineering Research Center of Estuarine and Oceanographic Mapping,Shanghai 201306,China;Shanghai XiangYang Survey&Design of Water Conservancy Co.,Ltd.,Shanghai 202150,China)
出处
《现代测绘》
2021年第2期40-42,共3页
Modern Surveying and Mapping
基金
上海市水务局科研项目(沪海科2020-01)
江苏省测绘地理信息科研项目(JSCHKY201816)
关键词
波束角
姿态
耦合效应
陡坡水域
水深测量
改正
angular beam-width
attitude
coupling effect
river with steep slope
bathymetry
correct
作者简介
第一作者:吴敬文,教授级高级工程师,研究方向为工程测量和海洋测绘等
