90年代的基本天体测量形势与我国改进恒星参考系的任务  

Prospect of Fundamental Astrometry in 90's and the Task of Improving the Stellar Reference System for China

作　　者：李东明[1] 鲁春林[1] 罗定江 

机构地区：[1]中国科学院紫金天文台 [2]中国科学院北京天文台

出　　处：《天文学进展》1990年第3期244-252,共9页Progress In Astronomy

基　　金：国家自然科学基金

摘　　要：天体测量参考架的工作正处在重大变革之中,各种技术(射电、光学,空间、地面)都在努力出作贡献。在90年代中后期,人们将第一次建立基于河外源的高精度射电参考架,实现射电/光学参考架的初步连接,恒星参考网络有可能扩充到13~m恒星,并为下一步扩充到17~m至18~m恒星作好准备。FK5参考系的改进和扩充对于推进光学参考架的发展仍然具有至关重要或决定性的意义。关于改进恒星参考系的工作,我国有相当好的基础。在某些观测方法和仪器方面颇有自己的特色。若能很好地组织,可以对此历史性的变化作出相当大的贡献。Great and rapid advances are being made for establishment of the celestial reference frame, to which contributions are made from various observational techniques (radio, optical, space and ground-based). In the middle or late 90's, the first high-accuracy radio reference frame with respect to extragalactic sources will be established, and a preliminary link between radio and optical frames will become true.In China, a good fundation for improvement of the stellar reference system has been laid and some methods and instruments used for observations with special features have been set up. Great contribution can be made to establishment of the celestial reference frame, provided that observational work, data reduction and theoretical analyses can be properly organized.

关 键 词：天体 测量 恒星 参考系 

分 类 号：P124[天文地球—天体测量]