基于EGM2008模型的GPS水准拟合方法应用研究——以尼泊尔西北部山区某水电站测量工程为例  

Research on the Application of GPS Leveling Fitting Method Based on EGM2008 Model——Taking a Hydropower Station Survey Project in the Northwestern Mountainous Area of Nepal as an Example

作　　者：李宗勋 LI Zongxun(Shanghai Urban Construction Design and Research Institute(Group)Co.,Ltd.,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《工程技术研究》2023年第1期71-73,152,共4页Engineering and Technological Research

摘　　要：常规GPS水准拟合方法被广泛应用于测量工程中,但其具有精度不够高的缺陷。对此,文章针对尼泊尔西北部山区某水电站测量工程中水准测量施测困难的问题,结合算例对基于EGM2008重力场模型的GPS水准拟合方法进行研究,并且与传统的GPS水准拟合方法进行对比。结果表明,在尼泊尔山区某水电站高程控制测量中,该方法的测量精度相对传统水准拟合方法有很大提高,且该方法能够满足四等水准测量的要求。Conventional GPS leveling fitting method is widely used in survey projects, but its accuracy is not high enough. In this regard, aiming at the difficulty of leveling measurement in a hydropower station survey project in the northwestern mountainous area of Nepal, this paper studies the GPS leveling fitting method based on EGM2008 gravity field model, and compares it with the traditional GPS leveling fitting method. The results show that in the elevation control survey of a hydropower station in the mountainous area of Nepal, the measurement accuracy of this method is greatly improved compared with the traditional leveling fitting method, and this method can meet the requirements of fourth-order leveling.

关 键 词：EGM2008重力场模型 水准拟合 高程异常 GPS 

分 类 号：P228.4[天文地球—大地测量学与测量工程]