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GPS高程测量在川藏线拉林段铁路勘测中的应用研究
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摘要
本文介绍了在铁路勘测中GPS高程测量的几种常规方法。重点介绍基于最新的地球重力场模型EGM2008的新方法,以解决在困难地区已知点数量和分布不能满足常规方法要求时如何快速可靠地进行GPS高程测量的难题。并以川藏铁路拉林段勘测数据为例进行数据计算分析,通过对不同方法计算得到的数学精度、所需已知点个数、高程分区大小等进行研究、比较和分析,总结出不同GPS高程测量方法的优缺点和适用范围,为下一步川藏铁路勘测工作提供一些有益的参考。
This article describes several conventional methods of GPS elevation survey in railway survey.It focuses on new methods based on the latest Earth's gravity field model EGM2008 to solve the problem how to conduct fast and reliable GPS elevation survey when the quantities and distributions of the known points can not meet the requirements of conventional methods in some difficult areas.
引文
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