Volume 36 Issue 1
Jan.  2016
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WANG Xixi, FANG Hanxian, NIU Jun, WANG Sicheng. Statistics on the critical frequency of ionospheric sporadic E layer observed at Puerto Rico region[J]. Journal of Space Science, 2016, 36(1): 18-24. doi: 10.11728/cjss2016.01.018
Citation: WANG Xixi, FANG Hanxian, NIU Jun, WANG Sicheng. Statistics on the critical frequency of ionospheric sporadic E layer observed at Puerto Rico region[J]. Journal of Space Science, 2016, 36(1): 18-24. doi: 10.11728/cjss2016.01.018

Statistics on the critical frequency of ionospheric sporadic E layer observed at Puerto Rico region

doi: 10.11728/cjss2016.01.018
  • Received Date: 2015-04-03
  • Rev Recd Date: 2015-10-12
  • Publish Date: 2016-01-15
  • The Es property in Puerto Rico region (18.5°N, 67.2°W) has been investigated using the Es critical frequency during 1997—2013. Results show that the diurnal average critical frequency presents a weak 16-day period which may be caused by the planetary wave. The critical frequency variation with local time has also been investigated which presents a valley (at about 06:00LT) and a peak (at about 14:00LT) structure. Two anomalous peaks exist after the midnight and sunset, respectively. The phenomenon is considered as a result of downward electron flux caused by the diedown of southward wind field and variability of electric field during the nighttime. It has also been found that the incidence of Es with lower strength is clearly different from those with medium and higher strength, and it can be attributed to the tidal wind. These physical mechanisms need to be proved by both observations and further mechanical investigation.

     

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