文章基本信息

标题：Effect of Ionospheric Perturbation on GPS Observation over Low Latitude Region, Bhopal
其他标题：Effect of Ionospheric Perturbation on GPS Observation over Low Latitude Region, Bhopal
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作者：S. Chatterjee ; P. K. Purohit
期刊名称：Journal of Scientific Research
印刷版ISSN：2070-0237
电子版ISSN：2070-0245
出版年度：2012
卷号：4
期号：3
页码：577-587
DOI：10.3329/jsr.v4i3.10146
语种：English
出版社：Rajshahi University
摘要：Increased knowledge on the ionospheric structure is of important interest for precise positioning, since the ionosphere has an impact on global positioning system (GPS) L-band radio waves by its free electrons. Especially during perturbed geomagnetic conditions when the ionosphere differs from its undisturbed state, quasi real time data assimilation would be useful. On the other hand, these perturbations of the GPS signals are taken as scientific information to investigate ionospheric scenarios. In this paper we describe the occurrence of GPS phase fluctuations during January to December 2005 events on the basis of Bhopal GPS observations. This study concerns the analysis of strong phase fluctuations which were associated with geomagnetic storms. The intensive total electron content (TEC) fluctuations observed along GPS satellite passes, demonstrate a strong horizontal gradient of TEC and difficulties with the carrier phase ambiguity in relative GPS positioning. In turn, the phase fluctuations can cause cycle slips.© 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v4i3.10146 J. Sci. Res. 4 (3), 577-587 (2012)
关键词：Physics;Global positioning system; Phase fluctuations; Geomagnetic storms; TEC; Cycle slips