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Power Spectrum Analyses of Cosmic Rays Observed by Short Time Scale, Biggest Beijing Superneutron Monitor Before the Severe Magnetic Storm on Nov. 24, 2001
Received date: 2001-12-19
Revised date: 2002-01-14
Online published: 2002-03-18
By analyzing the short time scale (t1 hour) power spectrum of cosmic rays observed at NM-64 Superneutron monitor at Beijing from Nov. 18/0000UT to 24/0000UT, 2001 before the severe magnetic storm with the lowest DST is-225. The analytical results show that there is no prominent period characteristic in cosmic rays power spectrum during the period form 18/0000UT to 20/0000UT. However, the 22.6154 minutes period characteristic of cosmic rays is very prominent during the period form 23/0000UT to 24/0000UT, while the other short time period characteristics are characterless which almost became noise level.
LE Gui-Ming , YE Zong-Hai , Ju-HongGONG . Power Spectrum Analyses of Cosmic Rays Observed by Short Time Scale, Biggest Beijing Superneutron Monitor Before the Severe Magnetic Storm on Nov. 24, 2001[J]. Journal of University of Chinese Academy of Sciences, 2002 , 19(2) : 163 -167 . DOI: 10.7523/j.issn.2095-6134.2002.2.011
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