摘要
超导重力仪被普遍认为是迄今为止观测精度高、连续性和稳定性最好的相对重力仪 ,但是在获得真实重力场变化之前 ,必须利用格值 (标定因子 )对这类仪器的直接输出量 (电压变化 )进行标定 .研究表明 ,格值的准确度将影响到观测数据的后续分析和资料的解释 ,本文利用两期 (每期 3天 ) FG5绝对重力仪在武汉国际重力潮汐基准站上的同址测量资料和该台站已知潮汐参数 。
It is recognized widely nowadays that the superconducting gravimeter (SG) is a kind of best relative gravimeter with high observing precision, good continuity and stability. However, it is necessary to calibrate the direct output (change in voltage) by using scale value (calibration factor) before getting the change of the real gravity field. Studies show that the accuracy of the scale value will influence the late analysis and explanation of the observations. By using absolute gravity measurements of a FG5 absolute gravimeter (AG) at Wuhan international tidal gravity fundamental station (two campaigns each for 3 days) and by using known tidal parameters at the same station, the calibration factors of the SG and their precision are studied in detail in this paper.
出处
《地震学报》
CSCD
北大核心
2001年第6期651-658,共8页
Acta Seismologica Sinica
基金
国家杰出科学青年基金 (4 992 54 11)
国家自然科学基金 (4 9774 2 2 3 )
中国科学院知识创新项目 (KZ952 - J1- 411
KZCX2 - 10 6 )联合资肋
关键词
超导重力仪
绝对重力仪
潮汐观测
标定因子
精度分析
superconducting gravimeter
absolute gravimeter
tidal observation
calibration factor
precision analysis
