高阶电离层延迟对GPS双差观测值和基线向量的影响  

Higher-Order Ionospheric Effects on the GPS Double Difference Observation and Baseline Vectors

作　　者：朱春春[1,2] 李征航[2] 屈小川[2] 申小平 

机构地区：[1]中交第二航务工程勘察设计院有限公司,武汉市民主路555号430071 [2]武汉大学测绘学院,武汉市珞喻路129号430079

出　　处：《大地测量与地球动力学》2015年第1期81-86,共6页Journal of Geodesy and Geodynamics

摘　　要：用RINEX HO软件计算GPS载波相位观测值中的高阶(二阶和三阶)电离层延迟,在此基础上组成GPS双差观测值中的高阶电离层延迟(ΔIH)p,qi,g。讨论了(ΔIH)p,qi,g与地磁纬度、基线长度、基线方向及太阳活动水平间的关系。在其他条件均相同的情况下,用Bernese 5.0软件分别对进行了高阶电离层延迟改正的观测值和未进行高阶电离层延迟改正的观测值进行基线解算,求得高阶电离层延迟对基线向量解的影响ΔbH。结果表明,ΔbH的数值很小,在一般情况下可忽略不计。ΔbH与基线长度及太阳活动水平等因素间并无必然联系,但随着时段的减小,ΔbH会随之增大。Ionospheric 2nd-order and 3rd-order items of GPS observation are calculated by RINEX HO software.On this basis,higher-order ionospheric delay（ΔIH）p,qi,gof the GPS double difference observation is determined.The relationship between（ΔIH）p,qi,gand geomagnetic latitude,baseline length,baseline direction and the sun＇s activity level are studied.Then,under the assumption that other conditions are the same,the Bernese 5.0software are applied to the baseline solution for the observed values,both under and not under the higher-order ionospheric delay correction.Higher-order ionospheric effects on baseline vectorsΔbH are calculated.The results show that the value ofΔbHis very small and can be ignored in the general case.ΔbH has no exact relationship with the factors such as baseline length,solar activity level and so on,but with the decrease of the time,ΔbH will increase.

关 键 词：高阶电离层延迟 GPS双差观测值 太阳活动水平 地磁纬度 基线向量解 

分 类 号：P228.42[天文地球—大地测量学与测量工程]