对流层投影函数选取对基准站坐标的影响分析  

Impact of Different Tropospheric Mapping Functions on Sites' Coordinates

作　　者：邓连生[1] 王锴华 马一方[2] DENG Liansheng WANG Kaihua MA Yi fang(School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China GNSS Research Center, Wuhan University, Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]武汉大学卫星导航定位技术研究中心,湖北武汉430079

出　　处：《测绘地理信息》2017年第5期36-38,41,共4页Journal of Geomatics

基　　金：国家杰出青年科学基金资助项目(41525014);国家自然科学基金资助项目(41374033)

摘　　要：通过处理IGS基准站2000-2014年的观测数据,比较分析了VMF1(vienna mapping function 1)和GMF(global mapping function)两种投影函数的选择对基准站坐标的影响。结果表明,两种投影函数引起的坐标变化在高程方向的影响大于水平方向,造成高程方向的坐标变化达3 mm。两种投影函数的不同也会造成基准站周期振幅的变化,周年振幅变化显著于半周年振幅变化。Analyzing the impact of different tropospheric mapping functions on sites＇ coordinates is of great importance for high precision data processing and analysis.This paper compares the effects of the VMF1 and GMF on sites＇ coordinates by processing the IGS observation data from2000 to 2014.Results show that the change caused by the two projection functions was larger in vertical direction than in level direction.The change of vertical difference reached up to 3 mm.The different of mapping function can also cause the change of periodic amplitudes at base stations,and the annual amplitudes have obvious variations than the semiannual amplitudes.

关 键 词：投影函数 坐标变化 周期振幅 高程方向 

分 类 号：P228.41[天文地球—大地测量学与测量工程]