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标题：Automated detection of Pi 2 pulsations using wavelet analysis: 2. An application for dayside Pi 2 pulsation study
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作者：M. Nosé
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2014
卷号：51
期号：1
页码：23-32
DOI：10.1186/BF03352206
出版社：Springer Verlag
摘要：We investigated statistical characteristics of dayside Pi 2 pulsations observed at Mineyama (25.5° geomagnetic latitude) from November 1994 through June 1996, using an algorithm to detect Pi 2 pulsations which was introduced in Part 1 of the accompanying paper. We obtained the following results. (1) The ratio of the number of Pi 2 pulsations on the dayside (06-18 MLT) to that on the nightside (18-06 MLT) was about 31%. (2) The polarization of the dayside Pi 2 pulsations changed from right-handed before local noon to left-handed after local noon. (3) Wave power of dayside Pi 2 pulsations in the H -component has a peak around local noon and dips on both dawn and dusk sides. (4) Frequency of the fundamental wave is ranging from 9 mHz to 30 mHz with dominant frequency of 17–24 mHz, and frequency ratios of the first three harmonics are 1: ( 1.7 ± 0.5): ( 2.3 ± 0.7 ). We found that the magnetospheric cavity model can explain most of these observational results.