联合GPS相位观测值与全球电离层图提取区域电离层TEC  

Local Ionospheric TEC Extraction Based on GPS Phase Observations and Global Ionospheric Maps

作　　者：马国正[1] 喻洋 

机构地区：[1]华东交通大学土木建筑学院,南昌市双港东大街808号330013 [2]中国三峡新能源公司云南分公司,昆明市春城路650000

出　　处：《大地测量与地球动力学》2015年第3期499-502,共4页Journal of Geodesy and Geodynamics

基　　金：长江科学院开放基金(CKWV2014217/KY);精密工程与工业测量国家测绘地理信息局重点实验室开放基金(PF2013-9);国家自然科学基金(41374011;41174010)

摘　　要：提出一种结合GPS相位观测值与全球电离层图提取区域电离层总电子含量的方法。由于没有采用伪距观测值,无需考虑差分码偏差的影响。实验表明,在不同区域以及不同电离层活动条件下,用该方法改正电离层延迟,其单频定位精度较采用全球电离层图有显著提高,与采用相位平滑伪距电离层延迟改正的结果总体上相当。In this paper, we propose a new method to extract local ionospheric Total Electron Content （TEC） from combined GPS phase observations and global ionospheric maps, considering the effect of differential code bias on phase smoothing code observations, as well as the lower accuracy of global ionospheric maps. This method does not need to consider the impact of differential code bias in the absence of code observations. The results show that the accuracy of single-frequency positioning using ionospheric delay correction with the proposed method improves significantly compared to that of global ionospheric maps. Moreover, overall it is consistent with the correction method of phase smooth code observations under different regions and different activity conditions of ionosphere.

关 键 词：GPS相位观测值 全球电离层图 电离层总电子含量 单频精密单点定位 

分 类 号：P229.42[天文地球—大地测量学与测量工程]