EGM2008在叶尔羌河防洪工程测量中的应用  

The application of EGM2008 in Yarkant River flood control engineering survey

作　　者：李玉平[1] 

机构地区：[1]新疆水利水电勘测设计研究院测绘工程院,新疆昌吉831100

出　　处：《工程勘察》2017年第8期61-65,共5页Geotechnical Investigation & Surveying

摘　　要：本文介绍了EGM2008模型的精度以及利用地球重力场模型进行GPS高程转换的原理和方法,详细叙述了EGM2008模型在叶尔羌河防洪工程测量项目中的应用及取得的效果。通过不同拟合方案比较及利用测区的GPS/水准数据对EGM2008模型高程异常精度进行了检验分析,结果表明基于EGM2008模型进行GPS高程拟合,可减小对控制点的分布及数量要求,从而获得更大的控制范围;利用EGM2008模型转换的GPS高程在一定范围内通过单点改正可达到四等水准的精度。This paper introduces the precision of EGM2008 model and the principle and method of using earth gravity field model to take GPS height transformation,and elaborates the application and achieved results in Yarkant River flood control engineering survey. With comparison of different fitting schemes,it utilized GPS/leveling data in the survey area to take height anomaly precision analysis of EGM2008 model.The results indicate that EGM2008 model-based GPS height fitting can loosen the requirements on distribution and quantity of control points,so as to achieve larger control range. The fourth-grade leveling precision can be achieved via single-point correction in certain range when EGM2008 model is used to transformation of GPS height.

关 键 词：EGM2008 高程异常 GPS高程测量 防洪工程测量 

分 类 号：P228.4[天文地球—大地测量学与测量工程]