The normal directions and shape of the magnetopause |
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| Authors: | Jianyong Lü J K Chao J H Shue H C Fu P Song |
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| Institution: | (1) Center for Space Science and Applied Research, 100080 Beijing, China;(2) Institute of Space Science, National Ccntral University, Taiwan, Chungli, China;(3) Space Physics Research Laboratory, University of Michigan University, Toyokawa, Japan |
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| Abstract: | The minimum variance and tangential discontinuity analyses are used to find the normal directions of the magnetopause using
550 crossings from ISEE 1 and 2, AMPTE/IRM, and IMP 8 satellites. Then, the average shape of the magnetopause is studied by
using two-region fit procedure. These studies show: (i) most of the crossings are reasonably characterized as tangential discontinuity;
(ii) there does appear to be east-west and north-south asymmetry in the shape of the magnetopause; (iii) the magnetopause
in the equatorial region is swept back from the vacuum location for both northward and southward IMF, which means that the
simple single conic section used in previous fits may not be appropriate to the entire shape of the magnetopause, especially
at the nightside.
Project supported by the National Natural Science Foundation of China (Grant No. 49374222). |
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| Keywords: | mapetopause MV analysis TD analysis solar wind |
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