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Chinese Journal of Space Science ›› 2017, Vol. 37 ›› Issue (5): 531-537.doi: 10.11728/cjss2017.05.531

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Numerical Simulation of Oblique Ionospheric Heating Effects in Nanjing Districtormalsize

GUO Zhe1,2, FANG Hanxian1,2, HE Yingming1, YANG Ding1,3, MA Jie1, JING Wenqi1, WANG Shiqi4   

  1. 1. Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing 211101;
    2. State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190;
    3. Meteorological Observatory, No. 93279 Air Force, Dandong 118000;
    4. Xi'an Satellite Control Center, Xi'an 710043
  • Received:2016-09-09 Revised:2017-03-08 Online:2017-09-15 Published:2017-09-06

Abstract:

Compared with vertical heating, oblique ionospheric heating has advantages of higher flexibility, wider effect range and more practicable operability. In this paper, based on the energy conservation equation and continuity equation of electron, the physical model is built for lower ionosphere heated by oblique radio wave by considering Ohm absorption in the non-deviated section, and oblique heating in low ionosphere over Nanjing district is simulated using the background parameters obtained by IRI-2007 and NRLMSISE-00 models. The results show that heating effect increases when incident elevation angle and effective radiated power increase. The rising amplitude of electronic temperature and density decreases when the frequency of radio wave increases. The perturbation amplitudes of electron temperature and density caused by X mode are bigger than those caused by O mode, and X mode can make electron temperature and electron density reach a steady state more quickly than O mode. Within a certain range, the radio wave with smaller incident elevation angle, lower frequency and larger effective power can make electron density reach a steady state more quickly, and the latter two can also accelerate the process of electron temperature to reach stability. The time that electron temperature to reach stability varies singlet with elevation angle of incident electromagnetic wave, and will be a maximum as the elevation angle is 62°.

Key words: Radio waves, Low ionosphere, Oblique heating, Electron temperature, Electron density

CLC Number: