摘要
在紫金山天文台１３．７米望远镜２２ＧＨｚ系统的基础上，建立了２２ＧＨｚ太阳高时间分辨率的观测系统．本文介绍了在原系统基础上改造的波束／负载调制器和双温定标系统，以及为实现高时间分辨率而专门研制的ＱＪ－２ＡＧ高速后端和独立的微机数据采集系统．投入使用的２２ＧＨｚ太阳高时间分辨率观测系统在时间分辨率为１０ｍｓ时，灵敏度为０．０２ｓｆｕ，系统增益稳定性在全功率方式下为０．８％／３０分钟，数据丢失率小于１．５×１０－４，计算机的附加噪声为±１ＬｓＢ．虽然系统投入使用时太阳活动已相当宁静，但由于系统具有的高灵敏度，间断进行的对日面活动区的监视观测仍获得十多个事件的完整资料．
Based on the 22GHz receiver system on the 13.7m telescope of Purple Mountain Observatory, the 22GHz solar observation system with high temporal resolution has been built in this paper, the improved beam/load switch, dual temperature scale calibrator, high speed back end and independent microcomputer data acquisition system specially prepared for realization of high temporal resolution are briefly introduced.Sensitivity of the system with 10ms resolution is 0.02sfu, the gain stability on the total power mode is 0.8%/30min, data drop rate less than 1.5 × 10-4, and the data noise of the data acquisition system is±1 LSB.Although solar activity has been rather quiet since the system was put into operation in the second half of 1992, from intermittent monitor observations of solar active region, as many as 17 events have been recorded.
出处
《天文学报》
CSCD
北大核心
1995年第2期193-199,共7页
Acta Astronomica Sinica
关键词
射电望远镜
太阳射电
高时间分辩率
观测系统
Radio telescope
Solar radio burst
High temporal resolution observation
