ASTROMETRIC OBSERVATIONS AFTER 1988.0

作     者：Li Zhengxin(Shanghai Observatory, Chinese Academy of Sciences ) 

出 版 物：《中国科学院上海天文台年刊》 (Annals Shanghai Astronomical Observatory Chinese Academy of Sciences)

年 卷 期：1994年

页      面：45-48页

学科分类：07[理学] 070401[理学-天体物理] 070402[理学-天体测量与天体力学] 0704[理学-天文学] 

主　　题：地球自转参数 纬度测量 天文学 ERP 时间测量 

摘      要：After the closing of the BIH at 1988. 0, 64-42 optical astrometric instrumcnts over the world were still operated in the past four years. A brief presentation of its situation since 1988. O is described, including the number of instruments operated, the numbor of mcasurements made,avorage precision of a group measurement and BRP obtained. A short discussion is also given.