空间纬度对于差分系统电离层格网性能的影响  

INFLUENCE OF SPACE LATITUDE ON DIFFERENTIAL IONOSPHERIC GRID SYSTEM

作　　者：冯炜[1] 陈向东[1] 吴星[2,3] 叶修松[4] 

机构地区：[1]北京环球信息应用开发中心,北京100094 [2]北京特种工程设计研究院,北京100028 [3]海军海洋测绘研究所,天津300061 [4]西安卫星测控中心,西安710043

出　　处：《大地测量与地球动力学》2011年第4期135-138,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40774031);全国优秀博士学位论文作者专项基金(200344);国家863计划项目(2007AA120603)

摘　　要：基于广域精密实时定位系统试算的电离层格网改正数据,使用两种加权方法对参考站上空信号穿刺点的电离层延迟进行了估算,并利用估算出的穿刺点电离层格网计算延迟和实际测量的穿刺点电离层延迟进行了比较。结果表明对于不同位置的测站,中高纬度格网改正较好,低纬度较差,这与电离层的特性有关,并不是加权内插校正方案造成的。On the basis of the ionospheric grid-correction data which are tested by wide-area precise real-time positioning system. The ionospheric delay of the signal puncture point over the reference station is estimated by using two weighting methods. Futher more the estimated ionospheric grid delay of the signal puncture point has been compared with those tested in the actual measurement. For the stations located in different positions, in the middle or high-latitude the grid correction is better than that in low-latitude. This result reveals that it is concerning to the characteristics of the ionosphere, but caused by weighted interpolation correction scheme.

关 键 词：差分系统 广域精密实时定位系统 电离层 格网 加权内插 

分 类 号：P228.41[天文地球—大地测量学与测量工程]