| 大尺度电离层行扰的GPS观测 |
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| 引用本文： | 张东和,K.Igarashi,肖佐,马冠一.大尺度电离层行扰的GPS观测[J].地球物理学报,2002,45(4):453-460. |
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| 作者姓名： | 张东和 K.Igarashi 肖佐 马冠一 |
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| 作者单位： | 1. 北京大学地球物理系,北京,100871;
2. 中国电波传播研究所青岛分所,青岛,266071;
3. Communication Research Lab, Toyko, Japan |
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| 基金项目： | 国家自然科学基金项目 ( 40 134 0 2 0 ,4 9990 4 55) |
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| 摘 要： | 利用日本境内的高空间分辨率的双频GPS台站资料,观测研究了发生于2000年7月中旬太阳强活动期间的一次大尺度电离层行扰. 结果表明:在7月15日11:00UT-1:00UT期间观测区域的电离层中出现了大尺度电离层行扰. 在15:00UT之前,扰动周期为2h左右,在15:00UT以后,扰动周期为1h左右;总电子含量扰动幅度的变化范围约为1-2TECU;通过对15:00-17:00UT之间总电子含量扰动曲线同相位点的分析,发现这期间的电离层行扰的扰动速度约为600-700m/s,扰动波长在2200km左右,扰动传播的方向几乎沿着经线从高纬向低纬传播. 该行扰与此次强太阳活动有直接的关系,因其发生在7月15日的磁暴急始之前数小时,因此与磁暴本身没有因果关系,应与磁暴之前先期到达地球空间的高能质子流有关.
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| 关 键 词： | GPS 总电子含量 大尺度电离层行扰 磁暴 星下点. |
| 文章编号： | 0001-5733(2002)04-0453-08 |
| 收稿时间： | 2001-09-23 |
THE OBSERVATION OF LARGE SCALE TRAVELLING IONOSPHERIC DISTURBANCES BASED ON GPS NETWORK |
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| ZHANG DONG HE , K. IGARASHI XIAO ZUO MA GUAN YI.THE OBSERVATION OF LARGE SCALE TRAVELLING IONOSPHERIC DISTURBANCES BASED ON GPS NETWORK[J].Chinese Journal of Geophysics,2002,45(4):453-460. |
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| Authors: | ZHANG DONG HE K IGARASHI XIAO ZUO MA GUAN YI |
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| Institution: | 1. Department of Geophysics, Peking University, Beijing 100871, China;
2. Qingdao Research Center, China Research Institute of Radio2wave Propagation, Qingdao 266071, China;
3. Communication Research Laboratory, Toyko, Japan |
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| Abstract: | A large scale travelling ionospheric disturbance (LSTID) during strong solar activity in the middle of July, 2000 is analyzed by means of the observation of high spatial resolution GPS network over Japan. It is found that a large scale travelling ionospheric disturbance occurred between 11:00UT and 18:00UT on July 15, 2000. Before 15:00UT the time period of LSTID is about 2h, then it becomes 1h or so. The amplitude of the disturbance is about 2 TECU. From the movement of the wave phase at different GPS station lined along same longitude, the phase velocity and wavelength of the travelling ionospheric disturbance between 15:00UT and 17:00UT is 600\_700 m/s and 2200 km. The wave propagates from higher latitude to lower latitude almost along the longitude line over observed region during this period. This TID has some relationship with the solar event occurred in the middle of July, 2000. Because the TID happened several hours before the sudden commencement of magnetic storm, the TID has not cause relation with the storm. The high flux of proton during the solar event should be responsible for this TID. |
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| Keywords: | GPS TEC LSTID Magnetic storm Sub ionospheric point |
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