| 自由落体式绝对重力仪中重力加速度精度的优化 |
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| 引用本文： | 胡明,张为民,田蔚,钟敏.自由落体式绝对重力仪中重力加速度精度的优化[J].大地测量与地球动力学,2016,36(8):694-697. |
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| 作者姓名： | 胡明 张为民 田蔚 钟敏 |
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| 摘 要： | 针对等时间间隔与等距离间隔两种工作模式,给出绝对重力仪中初始位移、初始速度、重力加速度等参数精度的极限表达式。详细讨论了重力加速度拟合精度随分频数、初始速度及数据段选取的变化,结果表明,通过增加分频数、降低初始速度、选择合适数据段等方法能提高重力值的精度。
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Optimization of the Standard Deviation of the Estimated Gravity Acceleration in the Free Fall Absolute Gravimeter |
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| HU Ming,ZHANG Weimin,TIAN Wei,ZHONG Min.Optimization of the Standard Deviation of the Estimated Gravity Acceleration in the Free Fall Absolute Gravimeter[J].Journal of Geodesy and Geodynamics,2016,36(8):694-697. |
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| Authors: | HU Ming ZHANG Weimin TIAN Wei ZHONG Min |
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| Abstract: | We show the asymptotical expressions for equal space in time (EST) and equal space in distance (ESD), in order to estimate the standard deviation of the parameters of the initial position, the initial velocity and the gravity acceleration. We then discuss the variation of the standard deviation of the gravity acceleration, caused by fringe scales, initial velocity and data segment. By increasing the scales, reducing the initial velocity and selecting the suitable data segment, we give the optimization method for obtaining a minimal value of the standard deviation of the gravity acceleration. |
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| Keywords: | absolute gravimeter free fall data segment equal space in time equal space in distance |
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