大地测量与地球动力学2012，Vol.32Issue(5)：137-142,6.
弹簧式连续重力观测非线性漂移影响因素分析
ANALYSIS OF NON-LINEAR DRIFT OF SPRING GRAVIMETER
摘要
Abstract
More than 3 years gravity data recorded at Guza seismostation using DZW gravimeter are analyzed a-long with ground water, precipitation and two global continental water storage models (GLDAS, CPC) . It is shown that the linear drift of the instrument is about 1 200 × 10-8ms-2/a stablely. Furthermore, after artificial disturbance (such as power interrupt, re-start, lightning), the instrument drift is inconsistent with the previous, so called non-linear drift that is different from linear drift. Corrected with polynomial fitting method considering the barth tide, air pressure arid polar tides, the gravity residual is ± (10 - 15) × 10-8ms-2 and shows 4 gravity anomalous variations synchronous with the precipitation for 3 years. So, this research indicates that the drift rule of spring gravity for long time and supply a new method for correcting drift and obstaining gravity variations affected by water loading.关键词
连续重力观测/弹簧重力仪/漂移规律/水负荷/季节性Key words
continuous relative gravimeter/ spring gravimeter/ drifting pattern/ water load/ seasonality分类
天文与地球科学引用本文复制引用
韦进,刘高川,李辉,申重阳,姚垚..弹簧式连续重力观测非线性漂移影响因素分析[J].大地测量与地球动力学,2012,32(5):137-142,6.基金项目
国家自然科学基金(41204058,40974015) （41204058,40974015）
全国重力台网学科中心运行经费(201201008) （201201008）
中国地震局地震研究所所长基金(IS201156069) （IS201156069）
