﻿ CG-5重力仪格值系数对重力数据处理的影响
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 大地测量与地球动力学  2019, Vol. 39 Issue (2): 210-214  DOI: 10.14075/j.jgg.2019.02.019

### 引用本文

WEI Shouchun, ZHU Yiqing, ZHAO Yunfeng, et al. Impact on Gravity Data Process of Scale Factor Coefficient of CG-5 Gravimeter[J]. Journal of Geodesy and Geodynamics, 2019, 39(2): 210-214.

### Foundation support

National Natural Science Foundation of China, No. 61627824, 41874092;Open Fund of State Key Laboratory of Geodesy and Earth's Dynamics, No.SKLGED2018-2-1-E; Combination Project with Monitoring, Prediction and Scientific Research of Earthquake Technology, CEA, No.CEA-JC/3JH-173803.

### 第一作者简介

WEI Shouchun, PhD, majors in data processing of mobile gravity, E-mail: scwei1986@126.com.

### 文章历史

CG-5重力仪格值系数对重力数据处理的影响

1. 中国地震局第二监测中心，西安市西影路316号，710054;
2. 中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室，武汉市徐东大街340号，430077;
3. 新疆维吾尔自治区地震局，乌鲁木齐市科学二街338号，830011

 $g = \sum\limits_{k = 1}^n {{E_k}{z^k}}$ (1)

 图 1 南天山重力测网路线 Fig. 1 Gravity monitoring network of southern Tianshan
1 观测资料及数据处理

2 格值系数变化对数据处理结果的影响

 图 2 实测标定前后剩余残差分布 Fig. 2 Residual distribution of adjustment before and after calibration

 图 3 标定前后重力场变化(2015-04~2015-08) Fig. 3 Gravity change before and after calibration(2015-04-2015-08)

 图 4 标定前后重力场变化(2015-08~2016-04) Fig. 4 Gravity change before and after calibration(2015-08-2016-04)

 图 5 标定前后重力场变化(2016-04~2016-08) Fig. 5 Gravity change before and after calibration(2016-04-2016-08)

 图 6 标定前后累积重力场变化(2015-04~2016-08) Fig. 6 Gravity change before and after calibration(2015-04-2016-08)

3 结语

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Impact on Gravity Data Process of Scale Factor Coefficient of CG-5 Gravimeter
WEI Shouchun1,2     ZHU Yiqing1     ZHAO Yunfeng1     HUSAN Irxat3
1. The Second Monitoring and Application Center, CEA, 316 Xiying Road, Xi'an 710054, China;
2. State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy and Geophysics, CAS, 340 Xudong Street, Wuhan 430077, China;
3. Earthquake Agency of Xinjiang Uyghur Autonomous Region, 338 Second Kexue Street, Urumqi 830011, China
Abstract: Three absolute gravimetric points in southern Tianshan gravity network are used as adjustment data, and repeated gravity data sets of 2015-2016 are used to calibrate two CG-5 gravimeters. Then, the adjustment results before and after calibration are compared. The results show that the scale factor coefficient after calibration is significantly different than the initial value. The adjustment precision obtained by the calibration value is obviously higher than that using the initial value. Additional systematic errors are introduced by using the scale factor with error. Differentiated gravity change results show that gravity change obtained by the calibration value reduced significantly. The analysis shows that using observation data from the gravity network to calibrate the scale factor of gravimeters can reduce the influence of scale factor with error on the adjustment result effectively. It is therefore useful to eliminate the false information on gravity change.
Key words: CG-5 gravimeter; scale factor coefficient; adjustment of gravity network; southern Tianshan