Self-attraction effect and correction on three absolute gravimeters
Self-attraction effect and correction on three absolute gravimeters
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DOI：
10.1088/0026-1394/49/4/560
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发表时间：
2012-02
期刊：
影响因子：
2.4
通讯作者：
E. Biolcati;S. Svitlov;A. Germak
中科院分区：
文献类型：
--
作者：
E. Biolcati;S. Svitlov;A. Germak
本文研究了绝对重力仪质量分布对重力场的扰动。所谓的自吸引效应（SAE）对测量精度，特别是国际比对和不确定度预算评估至关重要。分析了三种仪器：MPG-2、FG 5 -238和IMGC-02。SAE已使用基于有限元法模拟的数值方法计算。模拟的效应被视为额外的垂直重力梯度。应用于计算的g值的自吸引修正（SAC）为1 × 10 - 8 m s-2的量级。
The perturbations of the gravitational field due to the mass distribution of an absolute gravimeter have been studied. The so-called self-attraction effect (SAE) is crucial for the measurement accuracy, especially for International Comparisons, and for the uncertainty budget evaluation. Three instruments have been analysed: MPG-2, FG5-238 and IMGC-02. The SAE has been calculated using a numerical method based on finite element method simulation. The modelled effect has been treated as an additional vertical gravity gradient. The self-attraction correction (SAC) to be applied to the computed g value is of the order of 1 × 10−8 m s−2.