中山站成像式宇宙噪声接收机观测结果的初步分析

介绍了成像式宇宙噪声接收机在中山站的部署，分析了首批观测数据，得出中山站区宇宙噪声静日曲线。分析表明，观测期间中山站区的宇宙噪声吸收事件夜间与白天显著不同。在夜间，吸收事件呈脉冲式，持续时间为数分钟，吸收区域常在站区北侧出现，沿东西方向伸展；在磁中午附近，吸收事件持续时间在１小时以上，吸收区域南北侧较强，中央较弱。可以认为，夜间吸收区域对应着极光带，其吸收由极光粒子沉降引起；在磁中午，吸收区域对应着极隙区，其吸收可能与极隙区粒子沉降和对流有关。

PRELIMINARY RESULT OF IMAGING RIOMETER AT ZHONGSHAN STATION,ANTARCTICA

An imaging riometer with 8×8 antenna array was installed successfully at Chinese 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 QDC are deduced. Preliminary result show that cosmic noise absorption events is very different between night side and magnetic noon during the measurement over Zhongshan Station. In night side,there are often short duration impulsive absorption events with large absorption area in the northern side of the station,stretching in east west direction. In magnetic noon the absorption events is continuous,which last for more than 1 hour and with absorption area strengthen at northern and southern sides and weaken in the middle. It is thought that the absorption is caused by aurora particle precipitation in night side and by other particle precipitation or convection in cusp at magnetic noon.