利用GPS共视法确定重力位差及海拔高差的实验研究  

Determination of Geopotential Difference and Orthometric Height Difference Using GPS Common View

作　　者：刘杨[1] 申文斌[1,2] 夏敏[1] 易俊[1] 

机构地区：[1]武汉大学测绘学院,武汉市430079 [2]武汉大学地球空间环境与大地测量教育部重点实验室,武汉市430079

出　　处：《武汉大学学报（信息科学版）》2011年第6期640-643,共4页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2006AA12Z211);武汉大学大学生创新实验资助项目(S2008239);国家自然科学基金资助项目(40974015)

摘　　要：阐述了GPS共视法的基本原理,讨论了利用重力频移法通过GPS共视观测数据确定重力位差和高程差的方法。利用国际权度局(BIPM)发布的时间序列数据,选取了4个守时台站之间的时间差序列进行实验。结果表明,受目前GPS共视法精度所限,高程差计算值与理论值之间的平均差异和标准差在几十m的量级水平。GPS common-view approach is currently a widely used technique in time transfer.We analyze the principle and model of GPS common-view method and present a method to gain geopotential difference and orthometric height difference using GPS common-view data based on gravity frequency shift.We choose the time difference series among four stations from BIPM Circular T data to carry out the experiment.Results show that due to accuracy limit of GPS CV,the mean difference and standard deviation between calculated value and theory value of the height difference are at the order of tens of meters.

关 键 词：GPS共视法 重力频移 重力位差 高程差 

分 类 号：P228.42[天文地球—大地测量学与测量工程]