利用EUV模拟观测和CT方法重建均匀等离子体层全球密度分布——三维ART重建和地球遮挡效应研究
Deduction of the global density of plasmasphere reconstructed from the EUV images using CT method 2.Three dimensional parallel-beam ART reconstruction
查看参考文献24篇
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文摘
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本文对地球等离子体层和电离层进行了三维建模,并模拟卫星对30.4 nm极紫外线的探测过程,取得圆轨道平行束情况下的投影数据.采用改进的ART算法对所得数据进行三维重建,获得等离子体层的空间密度分布.结果表明,在投影角度覆盖180~。的情况下,重建结果很好地再现了模型中空间各点的数值.文章对实验结果从 CT重建方法的角度进行了讨论及分析. |
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其他语种文摘
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In this paper we built up a three dimensional model for the density distribution of earth plasmasphere.According to the physical procedure of 30.4 nm EUV detection,a numerical method was proposed which simulates the satellite imaging the plasmasphere along a circular orbit.To reconstruct the density distribution in such occasion a modified ART reconstruction method was worked out.Results showed that our method reconstructs the model very well. |
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来源
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地球物理学报
,2011,54(7):1691-1700 【核心库】
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DOI
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10.3969/j.issn.0001-5733.2011.07.001
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关键词
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CT
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三维平行束重建
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ART迭代
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地球遮挡问题
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地址
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1.
清华大学工程物理系, 粒子技术与辐射成像教育部重点实验室, 北京, 100084
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中国科学院空间科学与应用研究中心, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0001-5733 |
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学科
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地球物理学 |
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基金
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国家自然科学基金项目
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文献收藏号
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CSCD:4295015
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24
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