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Experimental earth tidal models in considering nearly diurnal free wobble of the Earth's liquid core

机译：考虑地球液核近日自由摆动的实验性潮汐模型

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摘要

Based on the 28 series of the high precision and high minute sampling tidal gravity observations at 20 stations in Global Geodynamics Project (GGP) network, the resonant parameters of the Earth's nearly diurnal free wobble (including the eigenperiods, resonant strengths and quality factots) are precisely determined. The discrepancy of the eigenperiod between observed and theoretical values is studied, the important conclusion that the real dynamic ellipticity of the liquid core is about 5% larger than the one under the static equilibrium assumption is approved by using our gravity technique. The experimental Earth's tidal gravity models with considering the nearly diurnal free wobble of the Earth's liquid core are constructed in this study. The numerical results show that the difference among three experimental models is less than 0.1%, and the largest discrepancy compared to those widely used nowdays given by Dehant (1999) and Mathews (2001) is only about 0.4%. It can provide with the most recent real experimental tidal gravity models for the global study of the Earth's tides, geodesy and space techniques and so on.
机译：基于全球地球动力学计划（GGP）网络中20个站点的28个系列的高精度和高分钟采样潮汐重力观测结果，得出了地球近日自由摆动的共振参数（包括本征周期，共振强度和质量因子）精确确定。研究了观测值与理论值之间的差异，通过重力技术可以证明液芯的实际动态椭圆率比静态平衡假设下的实际椭圆率大5％左右这一重要结论。在这项研究中，建立了考虑地球液核几乎昼夜自由摆动的实验性地球潮汐重力模型。数值结果表明，三个实验模型之间的差异小于0.1％，与如今Dehant（1999）和Mathews（2001）给出的广泛使用的模型相比，最大的差异仅为0.4％。它可以提供最新的实际潮汐重力实验模型，用于对全球潮汐，大地测量和空间技术等进行全球研究。

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