the National Natural Science Foundation of China (Grant Nos. 49634160, 40074038) ; the Major Scientific Project of the Chinese Academy of Sciences (655951-1-305).
Simultaneous observations at Zhongshan Station, Antarctica, during May 1-7, 1998 are presented to show the responses of the polar ionosphere to the April/May 1998 solar events. One of the main geo-effects of the solar...
the National Natural Science Foundation of China (Grant Nos. 40104009, 40074038);the Major Scientific Project of Chinese Academy of Sciences (655951-1-305);the National Social Commonweal Program (2001DIA50040-04); the Youth Foundation of the State Oceanic Administration of China (2000903).
The solar wind almost disappeared on May 11,1999: the solar wind plasma density and dynamic pressure were less than 1cm^(-3) and 0.1 nPa respectively, while the interplanetary mag- netic field was northward. The polar...