Volume 38 Issue 6
Nov.  2018
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Article Navigation >  Chinese Journal of Space Science  > 2018  >  38(6): 879-885
ZHANG Yabin, WU Jian, XU Zhengwen, XU Bin, XUE Kun, ZHAO Haisheng, WANG Xiaobin. Influence of Ionospheric Sporadic E on Radio Propagation in HF and VHF Band[J]. Chinese Journal of Space Science, 2018, 38(6): 879-885. doi: 10.11728/cjss2018.06.879
Citation: ZHANG Yabin, WU Jian, XU Zhengwen, XU Bin, XUE Kun, ZHAO Haisheng, WANG Xiaobin. Influence of Ionospheric Sporadic E on Radio Propagation in HF and VHF Band[J]. Chinese Journal of Space Science, 2018, 38(6): 879-885. doi: 10.11728/cjss2018.06.879
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Influence of Ionospheric Sporadic E on Radio Propagation in HF and VHF Band

doi: 10.11728/cjss2018.06.879

  • National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, Qingdao 266107

  • Received Date: 2017-07-11
  • Rev Recd Date: 2018-01-08
  • Publish Date: 2018-11-15
    Abstract
  • The Es layer is a sporadic E layer in the ionosphere, and its electron density can reach 100 times more than normal E layer. The Es layer can reflect radio waves in VHF (30~150MHz) band, and it has a significant impact on radio wave propagation in high HF (10~30MHz) band. In this paper, the observation data of the vertical and oblique ionospheric sounders is used to study the propagation characteristics of HF band radio waves in the Es layer. The attenuation coefficients of different types and altitudes of Es layer are obtained. According to the daily variation of f0Es, the diurnal variation of attenuation coefficient in HF band is obtained, and then the influence of Es layer on shortwave propagation is analyzed. In the absence of the ionospheric Es layer, it is not possible to achieve long-range VHF communication by the ionosphere. In order to quantitatively analyze the propagation attenuation of the VHF link by the Es layer, the ionospheric Es layer attenuation model is constructed by fitting the observation data of the European Broadcasting Union (EBU) links. The model and ITU (International Telecommunication Union) model are compared with the observed data. The results show that the model established in this paper is more accurate than ITU model.

     

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