Computer Science
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ep%26s...51...23n&link_type=abstract
Earth, Planets and Space, Volume 51, p. 23-32.
Computer Science
6
Scientific paper
We investigated statistical characteristics of dayside Pi2 pulsations observed at Mineyama (25.5° geomagnetic latitude) from November 1994 through June 1996, using an algorithm to detect Pi2 pulsations which was introduced in Part 1 of the accompanying paper. We obtained the following results. (1) The ratio of the number of Pi2 pulsations on the dayside (06-18MLT) to that on the nightside (18-06MLT) was about 31%. (2) The polarization of the dayside Pi2 pulsations changed from right-handed before local noon to left-handed after local noon. (3) Wave power of dayside Pi2 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 9mHz to 30mHz with dominant frequency of 17-24mHz, 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.
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