鞍山区域电离层模型构建及GNSS应用研究  

Study on the construction of Anshan regional ionospheric model and application for GNSS

作　　者：刘馨蕊[1] 马颖异[2] 

机构地区：[1]东北大学土地管理研究所,沈阳110819 [2]美国伊利诺伊大学芝加哥分校,芝加哥60608

出　　处：《测绘科学》2017年第3期80-85,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金青年科学基金项目(41104104;71501036);中央高校基本科研业务费资助项目(N141403001)

摘　　要：针对电离层延迟误差目前是GNSS导航定位精度最重要误差源的现状,通过GNSS参考站或跟踪站实测数据计算电子总含量值,建立区域电离层模型,监测区域电离层变化,进而找到削弱或消除电离层延迟误差影响方法。利用曲面拟合实现建模,在模型的建立过程中通过对不同的模型阶数进行设置,对比不同情况下的模型精度,从而确定特定区域内最佳数据采样间隔及阶数设置,并在最佳阶数设置情况下,比较了预报不同时段的精度,进而对延迟量预报问题进行探讨,得出一些有益结论。可以通过该模型单独解算流动站站点的实时电离层延迟信息,这对多基站CORS的站间距离选择和单基站CORS基准站和流动站之间距离设计,尤其对提高单频接收机以及GIS产品用户的定位精度和差分模型的覆盖范围都具有实际参考意义。Against the status that the ionospheric delay errors become one of major error sources,a regional or global ionospheric model was developed to monitor ionospheric movements through calculating total electron content by using practical measured data of GNSS reference stations or tracking stations,aiming at getting the ways to eliminate or reduce the ionospheric delay errors.The model was built with curved surface fitting.During the modeling,different precisions of different model orders were analyzed and compared to determine the optimum data sampling intervals and orders of a specific region.In the bestcase parameters,different forecasting precisions with different times were compared.And then it also discussed prediction problems of zenith delay.Some beneficial conclusions were gained.Real-time inoshperic delay of moving stations can be calculated with the model that we built,which is of practically reference to determine distances between stations of multi-base stations CORS and between base stations and moving stations of single base station CORS,especially to improve position accuracy of single frequency receivers and GIS products and enlarge the covering area of differential models.

关 键 词：电离层模型 GPS双频数据 总电子含量 CORS网络站 

分 类 号：P228[天文地球—大地测量学与测量工程]