| 磁暴期间南极South Pole站和McMurdo站电离层闪烁与GPS TEC时空变化相关性研究 |
| |
| 引用本文： | 尹萍,王慧美,潘丽静,郑亚男.磁暴期间南极South Pole站和McMurdo站电离层闪烁与GPS TEC时空变化相关性研究[J].极地研究,2016,28(4):514-522. |
| |
| 作者姓名： | 尹萍 王慧美 潘丽静 郑亚男 |
| |
| 作者单位： | 中国民航大学电子信息与自动化学院，天津 300300 |
| |
| 基金项目： | 中国民用航空局安全能力建设项目（AADSA0007）资助 |
| |
| 摘 要： | 目前,对电离层闪烁特性的研究大多集中在低纬度地区,而在极区,特别是在南极地区,由于测量数据稀少,所以研究十分有限。借助安装在南极South Pole站和Mc Murdo站的GPS闪烁监测仪,获取到实测的电离层闪烁数据,同时结合IGS网站提供的同址GPS观测数据,分析了2011年9月24—25日磁暴发生前,9月26日磁暴发生时以及9月27日磁暴发生后GPS L波段信号电离层相位闪烁和GPS TEC时空变化特征。分析显示,这次磁暴对电离层的一个重要的影响是在电离层扰动剧烈期间,相位闪烁活动及其强度在时间和空间分布上都显著增强。研究结果发现,在强电离层闪烁期间,实测的相位闪烁指数σ_Φ与由GPS观测数据推算的TEC变化率指数(ROTI)的变化非常相似,两者之间呈现出良好的相关性。从而证明,在如南极等缺乏独立电离层闪烁观测值的地区,GPS ROTI可以作为表征电离层闪烁的重要可选参数,进而可以借助全球分布的GPS观测数据来分析和研究电离层闪烁特性。
|
| 关 键 词： | 磁暴 南极 电离层闪烁 GPS ROTI |
| 收稿时间： | 2015-07-02 |
Correlation Between Ionospheric Scintillations and GPS TEC Spatiotemporal Variations at the South Pole and Mcmurdo Stations During a Magnetic Storm |
| |
| Abstract: | Most previous research on ionospheric scintillations has focused on low latitudes, while research in polar regions, especially Antarctica, has been limited because of the lack of measurements. This study investigated the characteristics of ionospheric phase scintillations and GPS TEC spatiotemporal variations during a magnetic storm on September 24—27, 2011. Scintillation data measured by GPS scintillation receivers at the South Pole and McMurdo stations, and GPS observation data provided by the IGS network at the same locations, were used to perform the study. Results showed that during the storm, the intensity of phase scintillations at both stations was enhanced remarkably. In addition, when the scintillations became strong, the temporal variation of the phase scintillation index (σΦ) was very similar to that of the rate of TEC index (ROTI) derived from GPS observations. Thus, the good correlation of phase scintillations with ROTI indicates that GPS ROTI could be used as an important optional parameter, especially in the absence of direct measurements of phase scintillation. Therefore, the globally distributed IGS GPS receivers could be used to provide substitute data for the study of ionospheric scintillations. |
| |
| Keywords: | magnetic storm South Pole ionospheric scintillation GPS ROTI |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《极地研究》浏览原始摘要信息 |
| 点击此处可从《极地研究》下载免费的PDF全文 |
|
