作者:Wu, YH (Wu, Yihao)[ 1,2 ] ; Luo, ZC (Luo, Zhicai)[ 1,3 ] ; Mei, X (Mei, Xi)[ 4 ] ; Lu, JK (Lu, Jiankang)[ 4 ]
JOURNAL OF SURVEYING ENGINEERING
卷: 143 期: 2
文献号: UNSP 05016011
DOI: 10.1061/(ASCE)SU.1943-5428.0000203
出版年: MAY 2017
摘要
The national/regional unified height datum is of great importance for the establishment of geospatial information infrastructure and the corresponding surveying applications. The geopotential-difference method is proposed for long-distance height-datum connection across seas based on global positioning system (GPS)/leveling, global geopotential model (GGM), and satellite altimetry data sets. For a case study, the Chinese height datum 1985 (CNHD85) in the mainland was connected to the local vertical datum (LVD) in Hainan across Qiongzhou Strait up to a distance over 30km. The results show that this method is independent of the selection of virtual leveling lines. Furthermore, evaluation with an indirect approach shows that the choice of GGM affects the quality of the normal height connection, where the relative accuracies of the solutions based on the Earth Gravity Model 2008 (EGM2008), European Improved Gravity Model of the Earth by New Techniques 6C (EIGEN-6C), EIGEN-6C3STAT, and EIGEN-6C4 models are 0.012, 0.0132, 0.022, and 0.009 m, respectively. The final CNHD85 normal heights of GPS/leveling benchmarks in Hainan were computed based on the EIGEN-6C4 model, and the closure of the height difference for the computed normal heights meets the tolerance requirement of the second-order spirit leveling. Moreover, the corresponding results indicate that the vertical datum difference between CNHD85 and LVD over Hainan is approximately at the level of 0.186 m.
关键词
作者关键词:Normal height connection; Global positioning system (GPS)/leveling data; Geopotential-difference method; Mean sea surface; Altimetric gravity anomalies
KeyWords Plus:VERTICAL DATUM; UNIFICATION; GPS; ALTIMETRY; SURFACE
作者信息
通讯作者地址: Luo, ZC (通讯作者)
| Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Phys Quant Measurement, Luo Yu Rd, Wuhan 430074, Peoples R China. |
地址:
| [ 1 ] Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Phys Quant Measurement, Luo Yu Rd, Wuhan 430074, Peoples R China |
| [ 2 ] Wuhan Univ, Sch Geodesy & Geomat, Wuhan 430079, Peoples R China |
| [ 3 ] Wuhan Univ, Sch Geodesy & Geomat, State Key Lab Informat Engn Surveying Mapping & R, Key Lab Geospace Environm & Geodesy,Minist Educ, Wuhan 430079, Peoples R China |
[ 4 ] China Railway Eryuan Engn Grp Co Ltd, Tongjin Rd, Chengdu 610000, Peoples R China |
电子邮件地址:zhcluo@sgg.whu.edu.cn
基金资助致谢
基金资助机构 | 授权号 |
National Natural Science Foundation of China | 41374023 41131067 |
Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University | |
State Scholarship Fund from the Chinese Scholarship Council | 201306270014 |
出版商
ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
类别/分类
研究方向:Engineering
Web of Science类别:Engineering, Civil
文献信息
文献类型:Article
语种:English
入藏号: WOS:000398543700001
ISSN: 0733-9453
eISSN: 1943-5428
期刊信息
· Impact Factor (影响因子): 0.884
