| CG-5型重力仪漂移特性与分时段平差处理 |
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| 引用本文： | 梁 霄,徐如刚,林承灏,储 飞,肖伟鹏,王 飞.CG-5型重力仪漂移特性与分时段平差处理[J].大地测量与地球动力学,2020,40(6):655-660. |
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| 作者姓名： | 梁 霄 徐如刚 林承灏 储 飞 肖伟鹏 王 飞 |
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| 作者单位： | 安徽省地震局;安徽省地震局郯庐断裂带中南段重点研究室 |
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| 基金项目： | 中国地震局地震科技星火计划(XH191204Y);安徽省地震局科研项目(20190405)。 |
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| 摘 要： | 详细分析了4台CG-5型重力仪的静、动态漂移特性,结果发现,单次的静态测试结果中,CG-5型重力仪静态漂移呈很好的线性上升趋势,但划分不同时间尺度,每个时间段的仪器漂移率仍存在一定差异。同时,静态漂移率也存在长期变化的特征,不同测期CG-5型重力仪的漂移率差异较大:刚出厂时,CG-5型重力仪的漂移率变化幅度较大;随着时间变化,幅度逐渐减小,最终在一定区间内震荡。4台仪器的动态漂移率与仪器空间变化关系不密切,但仪器间的漂移特性在静态漂移率的长期变化、上下山的动态实验和单个测期各测线的动态漂移率变化中都表现出较为一致的变化趋势。基于以上认识,采用分时段平差的方法对观测数据进行分段漂移改正,改正后各台仪器和总体的联测精度指标均有所提高。
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| 关 键 词： | CG-5型重力仪 静态漂移率 动态漂移率 漂移改正 平差 |
Drift Characteristics of CG-5 Gravimeter and the Method of Time-Division Adjustment |
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| LIANG Xiao,XU Rugang,LIN Chenghao,CHU Fei,XIAO Weipeng,WANG Fei.Drift Characteristics of CG-5 Gravimeter and the Method of Time-Division Adjustment[J].Journal of Geodesy and Geodynamics,2020,40(6):655-660. |
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| Authors: | LIANG Xiao XU Rugang LIN Chenghao CHU Fei XIAO Weipeng WANG Fei |
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| Institution: | (Anhui Earthquake Agency,558 West-Changjiang Road,Hefei 230031,China;Key Laboratory of Research on the South Section of the Tan-Lu Fault Zone,Anhui Earthquake Agency,558 West-Changjiang Road,Hefei 230031,China) |
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| Abstract: | In this paper, we carefully analyze the static and dynamic drift characteristics of four CG-5 gravimeters. We find that the static drift of CG-5 gravimeters increases linearly in one static test result. When we divide different time scales, there are still some differences in instrument drift rate in each time period. At the same time, the static drift rate varies over long periods of time. The drift rate of CG-5 gravimeters varies greatly with different measuring times. The drift rate of CG-5 gravimeters vary greatly when initially put into use, gradually decreases with time, and the final drift rate varies in a certain range. The dynamic drift rate of the four instruments is not closely related to the instrument space. The drift characteristics of each instrument show a relatively consistent trend in the long-term variation of static drift rate, in the dynamic test of uphill and downhill, and in the dynamic drift rate change process of each line in a single period. Based on the above, this paper uses the method of time-division adjustment to correct the drift of observation data. After drift correction, the data quality of each instrument and the whole system is improved. |
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| Keywords: | CG-5 gravimeter static drift rate dynamic drift rate drift correction adjustment |
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