Monitoring Seasonal Variations of Ionospheric TEC Using GPS Measurements

被引：0

作者：

CAI ChangshengCAI Changsheng School of Environment and Spatial Informatics China University of Mining and Technology Zhaishan Quanshan District Xuzhou China ^{[221008
]}

机构：

来源：

Geo-Spatial Information Science | 2007年 / 02期

关键词：

GPS; differential delay; ionosphere; TEC;

D O I：

暂无

中图分类号：

P228.4 [全球定位系统（GPS）];

学科分类号：

081105 ; 0818 ; 081802 ;

摘要：

The regional ionospheric model is adopted to determine satellite-plus-receiver differential delay. The satellite-plus-receiver differential delay is estimated as constant values for each day. Dual-frequency GPS pseudo-ranges observables are used to compute vertical TEC (VTEC). All the monthly mean VTEC profiles are represented by graphs using GPS data of the Beijing IGS site between 2000 and 2004. The monthly averaged values and amplitudes of VTEC are also represented by graphs. The results indicate that the VTEC has seasonal dependency. The monthly averaged values and amplitudes of VTEC in 2000 are about 2 times larger than that in 2004. The maximum VTEC values are observed in March and April, while the minimum VTEC values are observed in December. The seasonal variations trend is found to be similar after polynomial fitting between 2000 and 2004.

引用

页码：96 / 99

页数：4

共 4 条

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