Abstract
We studied the compressional wave event in Pc5 frequency range observed in the dawn-side magnetic equator on 9 March 1998 by Grad-Shafranov(GS) reconstruction method for the first time. To test the effectiveness of application of GS method on Pc5 compressional wave, we benchmarked our procedure by applying it to a one-dimensional current sheet model first. Excluding the left-hand corners, the average error magnitude was less than 10%. The reconstruction of actual data showed that we obtained the 2-D map of compressional wave without suffering model constraints for the first time. The magnetic filed lines density cyclical changed, and the wavelength was about 2–4 times earth radius. The reconstructed magnetic topology had a shape very similar to the empirical 2-dimensional standing wave model proposed by the former workers. Besides, we also recovered the plasma thermal pressure and current density of the wave quantitatively.
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Tian, A., Zong, Q. & Shi, Q. Reconstruction of morningside plasma sheet compressional ULF Pc5 wave. Sci. China Technol. Sci. 55, 1092–1100 (2012). https://doi.org/10.1007/s11431-011-4735-z
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DOI: https://doi.org/10.1007/s11431-011-4735-z