高精度绝对重力仪观测研究

中国计量科学研究院于1983年开始设计研究中国第二代可移式激光绝对重力仪（NIM-Ⅱ型）,1985年完成实验装置,并参加在法国巴黎举行的第二次国际绝对重力仪比对活动,1987年完成全部研究工作计划.本文较详细地阐述了近4年来在全国大面积实施绝对重力观测的结果.尤其在北京香山地震台,为了探索微重力观测研究,已建立了4个绝对重力点,开展了重力纵向垂直梯度、横向水平点位差及随时间变化的绝对重力观测研究.多年来为地震研究、地球物理研究及测绘、计量、国防等部门积累了一批绝对观测数据资料.这些基础性观测工作,对今后研究重力的非潮汐变化也有重要的意义.

OBSERVATION STUDY OF A HIGH ACCURACY AND ABSOLUTE GRAVIMETER

The absolute gravimeter of second movable laser (type N1M-H) are designed by the National Institute of metrology in 1983. The experimental equipment are presented in the contrast observations of the second international absolute gravimeter at paris in 1985. All research plans are completed in 1987. This paper described the observation results of absolute gravimeter extending about four years in all areas of China. Especially in Xiangshan Seismic Station, in order to study the microgravity variation, four points of absolute gravimeter were set up. The observation study of virtical gradient, harizontal variation and its variation with time are given. From geophysical surveys, national defence and other departments, absolute gravity data have accumulated in many years. For the nontidal gravity research, these fundational observations have important significance.