利用GPS观测值监测电离层TEC的季节性变化 Monitoring Seasonal Variations of Ionospheric TEC Using

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!JW!f3x;O0Abstract: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.

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Iv:h`p0@2}B7~+~M0School of Environment and Spatial Informatics, China University of Mining and Technology, Zhaishan, Quanshan District, Xuzhou 221008, China

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#u@h C;on ZT0地球空间信息科学学报(英文版)

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GEO-SPATIAL INFORMATION SCIENCE水利论文,`*yFMPSN'E`

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2007, 10(2)水利论文IM1a7vB%XaHf#I.\

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GPS水利论文"j1d+i'Ab%Ee

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differential delay水利论文8XNo[s)F g

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ionosphere水利论文E Q l;DQ'[#I-\N

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观测值 监测 电离层 季节性变化 seasonal variations polynomial fitting ionospheric model GPS data

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the Open Research Fund Program of the Geomatics and Applications Laboratory,Liaoning Technical University,theScience and Technology Fund of China University of Mining and Technology

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Z S CA"eHP0[期刊论文] 地球空间信息科学学报(英文版) --2007, 10(2)

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"v2dxSY d0The 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-freq...水利论文ew%W:c#^4c#XQ

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