Three-dimensional ray tracing of fast magnetosonic waves

Three-dimensional ray tracing of fast magnetosonic waves
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快磁声波的三维射线追踪

DOI:
10.1029/2012ja017589
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发表时间:
2012-06
影响因子:
--
通讯作者:
Lijun Tang
Lijun Tang
中科院分区:
--
文献类型:
--
作者:
Fuliang Xiao;Qinghua Zhou;Zhaoguo He;Lijun Tang

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本文首先利用全球核密度模型和场向密度模型对快磁声波进行了三维射线追踪。模拟结果表明,由于磁层反射,MS波主要局限在地磁赤道的几度范围内。来自向阳面不同L壳层的MS波可以通过等离子体层顶传入或传出等离子体层顶。特别是,MS波可以在MLT的广阔区域内向东(后来的MLT)或向西(早期的MLT)传播。目前的结果进一步揭示了各种传播特性,特别是重要的MS波的MLT分布。
A three dimensional ray tracing of fast magnetosonic (MS) waves is first performed by using a global core density model and a field-aligned density model. Simulating results show that MS waves are primarily confined within a few degrees of the geomagnetic equator due to magnetospheric reflection. MS waves originating from different L-shells on the dayside can propagate either into or out of the plasmasphere through the plasmapause. In particular, MS waves can propagate eastward (later MLT) or westward (earlier MLT) over a broad region of MLT. The current results further reveal a variety of propagation characteristics, particularly important for the MLT distribution of MS waves.
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