nutational

The nutational constant is unsuitable for the name of the primary constant; Other constats have also the new values. IAU 1976 System of Astronomical Constants falls behind the latest development in astronomy.

IAU1976天文常数系统已跟不上天文学的发展，并存在很大的缺陷，必须进行修订和改进。

Gravitational and pressure couplings between the solid inner core (SIC) and the rest of the Earth give rise to torques through which the inner core influences the nutational motion of the Earth.

摘要地球固体内核(SIC)和地球其馀部分之间的引力和压力的耦合作用引起了一个力矩，从而对地球的章动运动产生影响。

(1)The precessional and nutational modes are easily distinguished in Fg. 3, so estimates can be made of their frequency and damping.

进动和章动波型在图3中极易分清，因而就可以测算出他们各自的频率和阻尼。

nutational ellipse

章动椭圆

nutational angle

章动角

nutational growth

转头生长

nutational scanner

章动扫描仪

NUTAT

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