SOME OBSERVATIONAL RESULTS OF THE IONOSONDE AT WUCHANG DURING THE COORDINATED COMPAIGN IN THE PERIOD OF THE MAXIMUM SOLAR ACTIVITY

Up to March 1989, the coordinated observations during the maximum solar activity of the 22nd 11-year-cycle have been carried out for 6 times respectively in March, April, June(to July) and December 1988, and also in January and March 1989. The obvious and different effects on the ionosphere due to the violent solar variations, such as solar flare, could been found.