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| 引用本文： | 韦进,刘高川,李辉,申重阳,姚垚.??????????????????????????????????[J].大地测量与地球动力学,2012,32(5):137-142. |
| 作者姓名： | 韦进 刘高川 李辉 申重阳 姚垚 |
| 作者单位： | 1. 武汉大学测绘学院,武汉430079;中国地震局地震研究所(地震大地测量重点实验室),武汉430071;中国地震局地壳应力研究所武汉科技创新基地,武汉430071 2. 中国地震台网中心,北京,100045 3. 武汉大学测绘学院,武汉430079;中国地震局地震研究所(地震大地测量重点实验室),武汉430071 |
| 基金项目： | 国家自然科学基金(41204058,40974015);全国重力台网学科中心运行经费(201201008);中国地震局地震研究所所长基金(IS201156069) |
| 摘 要： | ???ù???????????3??????????????????????????????????λ?????????????????????????????????????????о?????????????????????????????????????????????????????????DZW?????????????????????????????????????????????1 200??10 -8 ms -2 /a??????????????????????????????????????????????????峱????????????????????????????ν??з??????????????????в?仯?????????10~15????10 -8 ms -2??????3???4?????????????????????????仯???????о?????????????????????????????????????????????????????????????????????????????????μ????????????? |
| 关 键 词： | ??????????? ?????????? ?????? ????? ?????? |
ANALYSIS OF NON-LINEAR DRIFT OF SPRING GRAVIMETER |
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| Wei Jin,Liu Gaochuan,Li Hui,Shen Chongyang,and Yao.ANALYSIS OF NON-LINEAR DRIFT OF SPRING GRAVIMETER[J].Journal of Geodesy and Geodynamics,2012,32(5):137-142. | |
| Authors: | Wei Jin Liu Gaochuan Li Hui Shen Chongyang and Yao |
| Institution: | 1,2) 1)School of Geodesy and Geomatics,Wuhan University,Wuhan 4300792)Key Laboratory of Earthquake Geodesy,Institute of Seismology,CEA,Wuhan 4300713)Wuhan Base of Institute of Crustal Dynamics,CEA,Wuhan 4300714)China Earthquake Networks Center,Beijing 100045 |
| Abstract: | More than 3 years gravity data recorded at Guza seismostation using DZW gravimeter are analyzed along 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 -8 ms -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 and polar tides, the gravity residual is ±(10-15)×10 -8 ms -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. |
| Keywords: | continuous relative gravimeter spring gravimeter drifting pattern water load seasonality |
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