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顶部电离层和等离子体层电子密度分布——基于GRACE星载GPS信标测量的CT反演

DOI: 10.6038/cjg20130902, PP. 2885-2891

Keywords: 电离层,等离子体层,层析,全球定位系统,GRACE卫星,电子密度增强结构

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Abstract:

本文利用两颗跟飞的GRACE卫星载GPS信标测量数据和基于差分相对TEC的层析算法,实现了全球范围的顶部电离层和等离子体层(450~5000km)层析成像.反演结果表明,利用低轨道卫星载GPS信标测量数据可以有效地重建顶部电离层和等离子体层的全球二维分布图像.对不同地磁活动条件下的天基层析反演结果表明,等离子体层电子密度随纬度的分布是不均匀的;在低纬赤道带,从顶部电离层向上延伸直到等离子体层,以及等离子体层中局地的电离增强云团,经常出现近似垂直于磁力线的电子密度柱状增强结构.

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