ASTROMETRIC OBSERVATIONS AFTER 1988.0
ASTROMETRIC OBSERVATIONS AFTER 1988.0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]
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.