摘要
为研究电离层电子密度的时空变化特性,利用中国陆态网络GPS观测数据和电离层层析成像技术,反演了地磁平静日四川上空电离层电子密度的剖面分布。结果表明,在不同纬度和高度上,电子密度存在明显的日变化特征。其最大值出现在06:00UT(北京时间14时),随着时间的推移,电子密度逐渐衰减,在22:00UT(北京时间6时)达到最小;且白天出现明显的E层,夜晚则消失。同时,表明电离层层析成像技术能够有效地监测电离层时空变化结构。
To study the temporal and spatial variations tribution of IED over Sichuan during the geomagnetic quiet of Ionospheric Electron Density (IED) , the profile dis- are inversed by using GPS observation data from Crustal Movement Observation Network of China (CMONOC) and ionospheric tomography technique. The results show that the diurnal variations of IED are obvious at various latitude and altitude. The maximum value of IED appears at 06 : 00UT. As time goes on, the value of IED gradually decreases and achieves the minimum at 22 :OOUT. E layer ap- pears in the daytime and disappears in the night. The study demonstrates that the ionospheric tomography (CIT) technique can be used to efficiently monitor temporal and spatial variation of ionospheric structures.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第6期115-120,共6页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金创新研究群体项目(41021061)
国家自然科学基金(41174012)
国家863计划项目(2013AA122502)
关键词
电离层
层析成像
电子密度
时空变化
GPS
ionosphere
tomography
electron density
temporal and spatial variations
GPS