摘要
随着社会经济的快速发展,对高分辨率高精度似大地水准面成果的需求日益增强。根据现代物理大地测量理论,使用高分辨重力、地形和地球重力场模型等资料,结合第二类Helmert凝集法,可以建立高分辨率高精度的区域似大地水准面。在对此方法讨论的基础上,以徐州市区域似大地水准面精化为例,结合江苏省卫星导航定位基准站网和高等级GNSS控制点,通过GNSS观测和二等水准联测等方式建立高精度高程异常控制网。根据获取的高程异常成果,利用8061个重力点数据、7.5″分辨率的DEM数据和ENGEN-6C4地球重力场模型,采用第二类Helmert凝集法,建立了徐州市2′×2′的似大地水准面。通过检验评定似大地水准面精度达到±0.008 m。
With the rapid development of social economy,the demand for high-resolution and high-precision quasi geoid is increasing.According to the theory of modern physical geodesy,this paper discusses the method of establishing high-resolution and high-precision regional quasi geoid by using the data of high-resolution gravity,terrain and earth gravity field model,combined with the second type of Helmert agglutination method.Taking Xuzhou regional quasi geoid refinement as an example,a high-precision height anomaly control network is established through Jiangsu provincial satellite navigation and positioning reference station network,high-level GNSS control network and second-class leveling.By using 8061 point gravity data,7.5″resolution DEM data and engen-6 c4 earth gravity field model,the second type Helmert agglutination method is used to determine the location of Xuzhou quasi geoid model,the accuracy of Xuzhou regional quasi geoid model is 0.008 M.
作者
王勇
黄强
徐义平
孔宪森
WANG Yong;HUANG Qiang;XU Yi-ping;KONG Xian-sen(Jiangsu Province Surveying and Mapping Engineering Institute,Nanjing Jiangsu 210013,China;Xuzhou Bureau of Natural Resources and Planning,Xuzhou Jiangsu 221116,China)
出处
《现代测绘》
2020年第6期55-57,共3页
Modern Surveying and Mapping
基金
江苏省自然资源科技项目(2020040)
作者简介
第一作者:王勇,高级工程师,研究方向为大地测量与导航定位。
