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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 被引量：5

Deduction of the global density of plasmasphere reconstructed from the EUV images using CT method 2. Three dimensional parallel-beam ART reconstruction
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摘要 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. 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.
作者 金鑫 李亮 陈志强 徐荣栏 黄娅 张丽
机构地区 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(清华大学) 中国科学院空间科学与应用研究中心
出处 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2011年第7期1691-1700,共10页 Chinese Journal of Geophysics
基金 国家自然科学基金项目(10905030 60772051 10575059)资助
关键词 CT 三维平行束重建 ART迭代 地球遮挡问题 CT, Three dimensional parallel-beam reconstruction, ART iterative method, Shelterproblem
分类号 P354 [天文地球—空间物理学]
  • 相关文献

参考文献24

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二级参考文献60

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共引文献30

同被引文献61

  • 1陈晔,马铁华.基于乘型ART算法的快速图像重建技术研究[J].应用基础与工程科学学报,2005,13(S1):136-141. 被引量：2
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  • 10Heang K T. An inversion formula for cone-beam reconstruction. SIAMJ. Appl. Math. , 1983, 43(3): 546-552.

引证文献5

二级引证文献9

地球物理学报
2011年 第7期

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