MHD tomography using interplanetary scintillation measurement
MHD tomography using interplanetary scintillation measurement
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DOI：
10.1029/2002ja009567
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发表时间：
2003-03-11
影响因子：
2.8
通讯作者：
Fujiki, K
中科院分区：
文献类型：
--
作者：
Hayashi, K;Kojima, M;Fujiki, K
[1]介绍了行星际闪烁（IPS）观测数据计算机辅助层析（CAT）分析的一种改进形式--磁流体层析（MHD）分析。当与MHD模拟相结合时，CAT分析可以从IPS视线积分速度数据重建1 Au内基于MHD的三维太阳风结构。同时，利用MHD层析成像分析结果，MHD程序可以模拟1 Au以外的实际情况，并外推到r ≥ 1 Au。目前的MHD层析成像的目的是重建全球结构的共转太阳风，假设全球太阳风没有显着变化的时间在一个卡林顿旋转。重建的三维太阳风变量包括行星际磁场（IMF）与在地球附近的太阳风观测数据进行了比较，得到了良好的相关性。我们预计，MHD模拟和IPS层析成像的结合将加强太阳风的研究和空间天气预报算法。
[1] The MHD tomography analysis, an advanced version of the computer-assisted tomography (CAT) analysis for interplanetary scintillation (IPS) observational data, is presented. When combined with a MHD simulation, the CAT analysis can reconstruct the MHD-based three-dimensional solar wind structure within 1 AU from the IPS line-of-sight integrated velocity data. At the same time, the MHD code can simulate the actual conditions in the heliosphere beyond 1 AU by utilizing the results of the MHD tomography analysis and extrapolate to r greater than or equal to 1 AU. The present MHD tomography aims to reconstruct the global structure of corotating solar wind, under the assumption that the global solar wind does not vary significantly in time during one Carrington rotation. The reconstructed three-dimensional solar wind variables including interplanetary magnetic field (IMF) are compared with the in situ measurement data made at the Ulysses spacecraft and nearby Earth, and good correlations are obtained. We anticipate that the combination of MHD simulation and the IPS tomography will enhance solar wind research and space weather prediction algorithms.