Abstract:

In this paper,we use an empirical method to derive the height of maximum electron concentration of the F 2 region and neutral meridional winds over Great Wall Station,Antarctic.Using the HWM 90 Model,the predictions of the meridional winds over Great Wall Station are also calculated. The results can explain two anomaly features of ionosonde data of GreatWall Station. In summer,peak values of f 0F 2 appear during night time. In winter,especially during June and July,f 0F 2 decrease dramatically compare to summer's data.Summer anomaly can be explained by combining effects of two competing cause,thermospheric winds and solar effects on ionosphere. The location of high geographic latitude and middle geomagnetic latitude of Great Wall Station is an important factor in this study.