粤港澳陆海统一似大地水准面模型构建与分析  

Construction and Analysis of Guangdong-Hong Kong-Macao Land and Sea Unified Quasi-Geoid Model

作　　者：骆奇峰[1,2] 刘文建 唐力明[1,2] 付振华 LUO Qifeng;LIU Wenjian;TANG Liming;FU Zhenhua(Guangdong Institute of Land Resources Surveying and Mapping,Guangzhou 510500,China;Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical Area of South China,MNR,Guangzhou 510500,China)

机构地区：[1]广东省国土资源测绘院,广东广州510500 [2]自然资源部华南热带亚热带自然资源监测重点实验室,广东广州510500

出　　处：《测绘与空间地理信息》2023年第2期76-79,共4页Geomatics & Spatial Information Technology

基　　金：广东省科技计划项目(2021B1212100003)资助。

摘　　要：采用75251个重力点数据和221个GNSS水准资料,以SGG-UGM-2地球重力场模型作为参考重力场,由Stokes-Helmert凝集法计算了2′2′格网粤港澳似大地水准面模型(模型2021),实现了陆海一体、覆盖粤港澳全域的高程基准统一。经精度检验及新旧模型差异分析,模型2021有效覆盖粤港澳全域及领海基线内海域,外符合精度从原有的±4.8 cm提升到±2.9 cm,其中,粤港澳大湾区模型精度达到了±1.8 cm,粤北山区、粤东沿海区域精度显著提升。Using 75251 gravity point data and 221 GNSS leveling data,taking the SGG-UGM-2 earth gravity field model as the reference gravity field,the Stokes-Helmert approach is conducted to construct the 2′2′resolution Guangdong-Hong Kong-Macao GNSS Gravity Quasi-Geoid Model(model 2021),realizing the unification of elevation datum that integrates land and sea,and covers the whole region of Guangdong-Hong Kong-Macao.According to the precision test and the difference analysis between the old and new models,model 2021 effectively covers the whole area of Guangdong-Hong Kong-Macao and sea area within territorial baselines,and its outer precision is promoted from±4.8 cm to±2.9 cm,GBA is±1.8 cm,and the error of the model 2021 in north mountain and east coastal sea area are significantly reduced.

关 键 词：粤港澳 陆海统一 似大地水准面模型 高程基准 

分 类 号：P223.0[天文地球—大地测量学与测量工程]