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《Journal of Geodesy and Geodynamics》 2010-05
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QUALITY ANALYSIS OF GNSS DATA BASED ON TEQC IN DIFFERENT ENVIRONMENTS

Yang Zhe1),Dai Wujiao1,2),Yu Wenkun1,2) and Liao Jianping1)(1)Department of Surveying Engineering & Geo-Informatics,Central South University,Changsha 4100832)Key Lab.Of Precise Engineering Surveying & Deformation Disaster Monitoring of Hunan Province, Changsha 410083)  
Multipath,signal diffraction and electromagnetic signal interference are the main factors to decrease the quality of GNSS data.All of these factors are related to the environment of the station.To know more about the relationship between the environment and data,the GNSS data collected from 7 stations in different environments are analyzed by using TEQC software and baseline solutions.The results show the following problems.1) Cycle slip,signal diffraction and multipath effect are the most serious when the GNSS antenna under trees.2) There is a certainextent of electromagnetic signal interference near wireless communication base station and radar station,but less under high voltage transmission line.3) Modern geodetic antenna is immune to the reflected signal when the antenna is above the water surface,but power-less to the reflected signal from the glass curtain wall.
【Key Words】: observation environment data quality GNSS(Global Navigation Satellite System) multipath effect TEQC(Translate Edit Quality Check)
【Fund】: 国家自然科学基金(40704002);; 湖南省科技重大专项基金(2008FJ1006);; 中南大学创新实验基金(LE10278)
【CateGory Index】: P228.4
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【Citations】
Chinese Journal Full-text Database 1 Hits
1 GU Weihong,TIAN Pengbo,WANG Zhenhui (Foshan Urban Planning Design and Surveying Research Institute, Foshan 528000, China);Applications of TEQC to GPS Data Pre-processing and Quality Checking[J];Geospatial Information;2008-06
【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 Wang Jianjun,Wu Beiping,Feng Jian(Faculty of Information Engineering,China University of Geosciences,Wuhan 430074,China);The Application of TEQC and QCVIEW32 in the Pretreatment of the GPS Observational Data[J];Chinese Journal of Engineering Geophysics;2010-05
2 Yan Ruili (No.63892 of PLA,Luoyang 471003);Error Analysis of Handling High-Stability Crystal Oscillactor by Using GPS Signals[J];Instrument Standardization & Metrology;2010-03
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