| Citation: | SHENG Xuelian, WU Jing, ZHANG Chonget al. Space magnetospheric line radiation above China[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(7): 1504-1513. doi: 10.13700/j.bh.1001-5965.2017.0525(in Chinese)
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The electric field data observed by DEMETER satellite in the space above China from 2008 to 2010 were analyzed, and 328 magnetospheric line radiation (MLR) events were detected. According to the spectrum of the existing MLR events, the characteristics and their possible cause of these MLR events were studied. We made statistical analysis on all MLR events, and the results indicated that there were more MLR events in daytime than in nighttime and more in winter and autumn than in summer and spring. MLR showed no significant dependence on geomagnetic activity. Most of events were distributed in the low and medium latitude. The frequency intervals of MLR events were between 55 Hz and 95 Hz, the frequency drift rates were mostly in the range of 0-0.4 Hz/s, and peak intensities in frequency-time spectrograms seemed to be independent of latitude. The characteristics of MLR events observed in the space above China were similar to those of power line harmonic radiation (PLHR) events, but different from those observed abroad.
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