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本文首次使用Grad-Shafranov(GS)方法研究了1998年3月9日晨侧磁赤道附近ULFPc5压缩波事件.为了验证GS方法对ULF重构有效性,先用一维电流片模及其析检验了GS重构方法对开放磁力构重构效果,果表明除了边角磁势之外,整开放磁力构重构误差在10%以内.我们GS重构果首次给出了受任模约束压缩波二维图象,显示了磁力疏密交变化特征.进一定量出ULFPC5压缩波波长为2至4个地球半,磁场态与前人提出经验压缩波2维驻波模似.在本文重构中,仅重现了ULFPc5压缩波三个磁场分量分,还定量地重现了波场中热压强电流密度分.
This paper, for the first time, uses the Grad-Shafranov (GS) method to study the compressional wave of ULFPc5 near the morning equator on March 9, 1998. In order to verify the effectiveness of the GS method for ULF reconstruction, a one-dimensional current patch and its analytical The reconstruction effect of GS reconstruction method on open magnetic force structure shows that except for the corner magnetic potential, the reconstruction error of the entire open magnetic force structure is less than 10%. For the first time, Dimensional image shows the alternating magnetic flux density characteristics.A certain amount of ULFPC5 compression wave wavelength of 2 to 4 Earth’s half, magnetic field state and previous experience of compressional wave 2-D standing wave simulation.In this paper, reconstruction Only reproduces the three magnetic field components of the ULFPc5 compression wave and quantitatively reproduces the hot-pressure current density in the wave field.