基于EGM2008模型的陆海高程基准统一方法  

Research on Unified Method of Land and Sea Elevation Datum Based on EGM2008 Model

作　　者：王建成[1] 沈清华[1] 王小刚[1] WANG Jiancheng

机构地区：[1]中水珠江规划勘测设计有限公司,广东广州510610

出　　处：《地理空间信息》2018年第11期101-103,109,126,共5页Geospatial Information

基　　金：珠江流域重点区域(珠江干流中下游及珠江河口)统一高程系统资助项目(水规计[2010]366号)

摘　　要：通过阐述"移去—拟合—恢复"技术原理,结合珠江河口海岛统一高程基准工程实例,分析比较了直接拟合与不同重力场模型拟合的精度,证明了EGM 2008模型具有较高的拟合精度;并利用外部验潮资料进行检核。结果表明,基于EGM 2008模型的"移去—拟合—恢复"技术能为海岛提供统一的高程基准。Based on the principle of“Removal-Fitting-Recovery”technology,combining with the example of the unified elevation datum project in the Pearl River Estuary,we analyzed and compared the fitting accuracy of the direct fitting and different gravity field models,which proved that the EGM2008 model had a high fitting precision.And then,we used the external tidal material to check the precision of the EGM2008 model.The result shows that the“Removal-Fitting-Recovery”technology based on EGM2008 model can provide a uniform elevation datum for islands.

关 键 词：EGM2008模型 “移去—拟合—恢复”技术 陆海高程统一 

分 类 号：P228[天文地球—大地测量学与测量工程]