本文介绍了1991年上海天文台VLBI观测概况。
VLBI observations at Shanghai Observatory in 1991 are described.
一种守时用极小型氢脉泽频率标准正在上海天文台研制。
A type of small Hydrogen maser used for time-keeping is being developed in Shanghai Observatory.
本方法首先用于检测上海天文台SLR跟踪望远镜动态系统差的试算。
The method is first used to test detection of dynamic systematic errors for SLR tracking telescope at Shanghai Observatory.
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