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Statistical property of the Chandler wobble excitation function

机译：钱德勒摆动激励函数的统计性质

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摘要

The Chandler wobble excitation function (hereinafter, geodetic excitation) is obtained by removing the seasonal components and low frequency components with periods from several years to decades from the polar motion excitation function derived from SPACE2002 series. The geophysical excitation functions of the individual AAM, OAM, HAM, and two combined excitations of the AAM + OAM and AAM + OAM + HAM at Id, 5d, 1m and 3m intervals are statistically tested for the hypothesis of the normality, and then tested for the hypotheses of identical distribution between the geodetic and the geophysical excitations. The results show that, among the total 16 components of the two combined .excitation functions at Id, 5d, 1m and 3m intervals , most follow random normal processes, the hypotheses of identical distribution between the geodetic excitation and the two combined excitation are acceptable, while most of the hypotheses of identical distribution between the geodetic excitation and the individual excitations of the AAM, OAM, and HAM are rejectable. These results elucidate from a new point of view, that the excitations from AAM, OAM, and HAM are the main sources of the Chandler wobble, and the Chandler wobble excitation function is of a random normal property.
机译：通过从源自SPACE2002系列的极运动激发函数中去除数年至数十年的季节性分量和低频分量来获得Chandler摆动激发函数（以下称为大地激发）。分别以Id，5d，1m和3m的间隔对单个AAM，OAM，HAM的地球物理激发函数以及AAM + OAM和AAM + OAM + HAM的两个组合激发进行正态性假设的统计检验，然后进行检验对于大地测量和地球物理激发之间的相同分布的假设。结果表明，在Id，5d，1m和3m间隔的两个组合激励函数的总共16个分量中，大多数遵循随机正态过程，大地激励与两个组合激励之间的分布相同的假设是可以接受的，而大地测量激发与AAM，OAM和HAM的单个激发之间相同分布的大多数假设都是可以接受的。这些结果从一个新的角度阐明了，来自AAM，OAM和HAM的激励是Chandler摆动的主要来源，并且Chandler摆动的激励函数具有随机正态性质。

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