基于EGM模型的多波束无验潮测深技术应用  

Application of Multibeam Non-Tidal Sounding Technology Based on EGM

作　　者：江林 陈振宇[1,2] 胡云朋 董迪[3] 粱湛 刘晃 JIANG Lin;CHEN Zhen-yu;HU Yun-peng;DONG Di;LIANG Zhan;LIU Huang(South China Sea Marine Survey and Technology Center,Guangzhou 510300,Guangdong Province,China;Key Laboratory of Technology for Safeguarding of Marine Rights and Interests and Application,State Oceanic Administration,Guangzhou 510300,Guangdong Province,China;South China Sea Institute of Planning and Environmental Research,Guangzhou 510300,Guangdong Province,China)

机构地区：[1]国家海洋局南海调查技术中心,广东广州510300 [2]国家海洋局南海维权技术与应用重点实验室,广东广州510300 [3]国家海洋局南海规划与环境研究院,广东广州510300

出　　处：《海洋技术学报》2019年第5期104-108,共5页Journal of Ocean Technology

基　　金：国家海洋局南海分局海洋科学技术局长基金资助项目(1627);海洋公益性行业科研专项资助项目(201305028);海洋环境安全保障专项资助项目(2017YFC1405502)

摘　　要：多波束水深测量中受潮汐因素的影响,测量垂直基准是变化的,具有瞬时性。传统多波束测量,需在测区内设立一个或多个验潮站进行同步水位观测,最终将水深归算到深度基准面上。针对多波束水深测量中垂直基准转换的复杂性问题,文中基于地球重力场模型,结合测区内实测的GNSS/水准数据,通过插值算法建立了测区范围内似大地水准面精化模型,构建了多波束无验潮水深测量的垂直基准转换模型。通过实例表明,该方法有效地消除了潮汐、动态吃水及涌浪等因素影响,直接获取深度基准面的水深值,提高工作效率,可满足近岸多波束水深测量的工作需求。In multibeam bathymetry,the vertical datum is variable and instantaneous,influenced by tides.In traditional multibeam bathymetry,researchers should set up one or more tide stations in the survey area,to synchronously observe the water level,and reduce the water depth to the chart datum.Due to the complexity of vertical datum conversion in multibeam bathymetry,this paper proposes a vertical datum conversion model for multibeam non-tidal sounding,by building the quasi-geoid model with interpolation method in the survey area,with the EGM and the GNSS/leveling data.This method can directly obtain the bathymetric value of depth datum and meet the demand of offshore multibeam bathymetry.In terms of error,this method can effectively eliminate the effects of tides,dynamic draft,surging waves or other factors,which can improve work efficiency.

关 键 词：水深测量 无验潮 多波束 EGM2008模型 

分 类 号：P229[天文地球—大地测量学与测量工程]