基于EGM2008的分区拟合在铁路高程中的应用研究  

The Application of Partition Fitting Based on EGM2008 to Railway Elevation

作　　者：袁士涛 

机构地区：[1]中国铁路设计集团有限公司,天津300251

出　　处：《工程地球物理学报》2018年第1期112-116,共5页Chinese Journal of Engineering Geophysics

摘　　要：利用精确的高程异常模型,可以实现将GNSS大地高转换为正常高,满足铁路工程勘测的需要。本文基于GNSS/水准测量数据,对EGM2008地球重力场模型在铁路高程拟合中的应用进行拟合研究,得出在地形变化明显的地区,分区拟合较整网拟合精度要高。With the accurate model of elevation anomaly,it is possible to convert the ellipsoid height of GNSS into the normal height and meet the needs of railway engineering survey.Based on the GNSS/leveling data,this paper analyzes the application of EGM2008 earth gravity field model in the railway elevation.It is proved that partition fitting can get higher precision than the whole fitting in the terrain undulating area.

关 键 词：地球重力场 高程异常模型 高程拟合 

分 类 号：P223[天文地球—大地测量学与测量工程]