Preliminary result of imaging riometer at Zhongshan Station, Antarctica

摘要

An imaging riometer with 8×8 antenna array was installed successfully at Zhongshan Station, Antarctica in January 1997. The structure and working principle of The instrument are described. The first set of observation data is analyzed and the quiet Day cure (QDC) are deduced. Preliminary results show that cosmic noise absorption is Very different between night side and magnetic noon. In night side, there are often Short-duration impulsive absorption events with a large absorption area in the northern Side of the station, stretching in an east-west direction.