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标题：Tropospheric wet delay estimation using GNSS: Case study of a permanent network in Egypt
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作者：Ashraf EL-Kutb Mousa ; Ashraf EL-Kutb Mousa ; N. Aboualy 等
期刊名称：NRIAG Journal of Astronomy and Geophysics
印刷版ISSN：2090-9977
电子版ISSN：2090-9985
出版年度：2016
卷号：5
期号：1
页码：76-86
DOI：10.1016/j.nrjag.2016.01.002
语种：English
出版社：Elsevier
摘要：Abstract The tropospheric delay is a serious error source for positioning using Global Navigation Satellite Systems (GNSS). Since the scientific applications of GNSS positioning such as crustal deformation studies and earthquakes prediction require high accuracy in positioning, analysis of tropospheric delay calculation is necessary to improve GNSS positioning accuracy. In this study data from ground based GNSS receivers are used to evaluate effect of the tropospheric delay in position determination accuracy. These data are also used to study the tropospheric delay characteristics. The collected GNSS data are for the year 2013, taken from 8 stations from Egypt Permanent GNSS Network (EPGN) and 13 IGS stations. The GNSS data were processed using advanced GNSS software called Bernese V 5.0. The results show that the RMS of the coordinates is better in case of making estimation for the troposphere ZWD and bad in case of ignoring the troposphere. Also there is a correlation between the troposphere and the height component. The troposphere ZWD values have daily, temporal and spatial variation, depending on time in the day, day in the year, geographic location of the station and how near it to water. The ZWD values also go upward from the start to the end of the year, and also it shows high correlation with the water vapor content in the troposphere.
关键词：KeywordsGNSSTropospheric delayAccuracy