Reconstruction of the free-falling body trajectory in a rise-and-fall absolute ballistic gravimeter
Reconstruction of the free-falling body trajectory in a rise-and-fall absolute ballistic gravimeter
复制标题
升降式绝对弹道重力仪中自由落体轨迹的重建
DOI：
10.1088/0026-1394/45/3/007
复制
发表时间：
2008
期刊：
影响因子：
2.4
通讯作者：
F. Pennecchi
中科院分区：
文献类型：
--
作者：
W. Bich;G. D’Agostino;A. Germak;F. Pennecchi
绝对弹道重力仪可以测量自由落体加速度，其不确定度为109分之几。通常，使用干涉测量方法跟踪经受重力场的测试体的垂直轨迹，并且在最小二乘调整中将运动的数学模型拟合到时间-位置坐标。在本文中，我们描述了一个非线性回归分析应用于IMGC-02移动式重力仪，在Istituto Nazionale di Ricerca Metrologica（INRIM）。我们展示了该方法如何产生一个准确的估计的自由落体加速度，避免测量的垂直梯度。
Absolute ballistic gravimeters can measure the free-fall acceleration with an uncertainty of few parts in 109. Typically, the vertical trajectory of a test body subjected to the gravity field is tracked using interferometric methods, and a mathematical model of the motion is fitted to the time–position coordinates in a least-squares adjustment. In this paper, we describe a non-linear regression analysis applied to the IMGC-02 transportable gravimeter, developed at the Istituto Nazionale di Ricerca Metrologica (INRIM). We show how the method yields an accurate estimate of the free-fall acceleration avoiding measurement of the vertical gradient.