| 全球电离层时空变化特性分析 |
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| 引用本文： | 韩吉德,王祖顺,王春青.全球电离层时空变化特性分析[J].测绘信息与工程,2012,37(6):26-29. |
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| 作者姓名： | 韩吉德 王祖顺 王春青 |
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| 作者单位： | 青海省测绘地理信息局第二测绘院,西宁市黄河路15号,810001 |
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| 摘 要： | 采用谱分析和小波分解的方法对全球电离层VTEC量的时空变化特性进行了分析。使用IGS中心发布的全球电离层网格图数据,分别从高中低纬度全年变化特性、南北半球全年变化特性、全球范围内随经纬度的变化特性对电离层VTEC进行了分析。结果表明,高中低纬度地区VTEC量具有周日和半周年变化现象,在二分点处存在峰值,南半球电离层较北半球电离层活跃,经度变化对VTEC值的影响较纬度变化大,总体上,太阳辐射是电离层活动的主要影响因素。
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| 关 键 词： | 电离层 VTEC 时空变化 序列分析 |
Analysis of Temporal and Spatial Change in Global Ionosphere |
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| HAN Jide,WANG Zushun,WANG Chunqing.Analysis of Temporal and Spatial Change in Global Ionosphere[J].Journal of Geomatics,2012,37(6):26-29. |
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| Authors: | HAN Jide WANG Zushun WANG Chunqing |
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| Institution: | (The Second Surveying and Mapping Institute of Qinghai Bureau of Surveying,Mapping and Geoinformation, 15 Huanghe Road,Xining 810001,China) |
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| Abstract: | The temporal and spatial features of global VETC are investigated with spectral analysis and wavelet decomposition.We use a global ionospheric map of IGS to analyze some important dimensions of VTEC,annual changes in high,medium and low latitude,annual changes in north and south,and global changes in longitude and latitude.The results shows that VTEC has a daily and a semi-annual periods,and a peak during in the equinox,ionospheric activity in the south is more active than that in north and is very active in region from 75°E to 120°E near the equator.The influence of longitude on VTEC is more pronounced than latitude.In general,solar radiation is the main influencing factor in ionospheric activity. |
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| Keywords: | ionosphere VTEC temporal and spatial variation sequence analysis |
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