diurnal nutation
... diurnal motion 周日运动 diurnal nutation 周日章动 diurnal parallax 周日视差 ...
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根据地球自由核章动在周日重力潮汐观测中的共振效应确定了自由核章动的复本征周期和品质因子Q 值，研究了极移重力效应；
The complex eigen period period and Q value of the FCN are evaluated based on the resonance observed in the diurnal tidal gravity, the gravity change due to the polar motion is also studied.
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