Volume 37 Issue 1
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YANG Ding, FANG Hanxian, MA Qiang, WANG Sicheng. Effects of Pre-heating Time on Pre-heating Amplitude-modulation in the Lower Ionosphere[J]. Journal of Space Science, 2017, 37(1): 59-66. doi: 10.11728/cjss2017.01.059
Citation: YANG Ding, FANG Hanxian, MA Qiang, WANG Sicheng. Effects of Pre-heating Time on Pre-heating Amplitude-modulation in the Lower Ionosphere[J]. Journal of Space Science, 2017, 37(1): 59-66. doi: 10.11728/cjss2017.01.059
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Effects of Pre-heating Time on Pre-heating Amplitude-modulation in the Lower Ionosphere

doi: 10.11728/cjss2017.01.059

  • 1. Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing 211101;

  • 2. State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • Received Date: 2015-11-05
  • Rev Recd Date: 2016-05-23
  • Publish Date: 2017-01-15
    Abstract
  • Based on the energy conservation equation and electron continuity equation, the pre-heating amplitude-modulated theoretical model for the lower ionosphere is established. Then, the oscillations process of ionospheric conductivity and current, which amplitude are modulated by high power electric wave are simulated. Furthermore, the effects of pre-heating time on Extremely Low Frequency/Very Low Frequency (ELF/VLF) radiation levels are studied thoroughly. The results indicate that the electric current in the lower ionosphere can be modulated effectively by high power electric wave, and can be used as the radiation source of ELF/VLF. The longer the pre-heating time is, the more effectively the pre-heating amplitude-modulated model is. If taking the energy loss into account, as the heating conditions are PER=200MW and fELF/VLF=1kHz, the effect of ELF/VLF radiation with the pre-heating amplitude-modulated model is the best when the pre-heating time is 0.1s. And the ELF/VLF radiation levels are improved by 7.95dB.

     

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