摘要
本文应用AR谱估计的Marple算法对1983年9月-1987年9月的地球自转序列ERP(SHA)87L01和ERP(CSR)88L01中的极位置序列(xpyp)SEA和(xpyp)CSR进行了谱分析其结果如下:以上结果表明两个极位置序列除了强德勒项和周年项外均没有发现其他周期项。(两序列的强德勒项的周期和振幅基本相同周年项的周期和振幅稍有差别)。本文还对这两个极位置序列的测定精度进行了外符检核结果表明两序列的外符精度对xp为2.0mas对yp为2.1mas。
Using the Marple algorithm of AR spectrum, We have made the spectral estimation for two SLR polar motion series (from Sept. 1983 to Sept. 1987): (Xp,yp)SHA and (xp, yp)csR reduced by two analysis centers of SLR global data: Shanghai Observatory Acade-mia Sinica Chine and the Center for Space Research, Texas University at Austin U. S. A. The estimated results are as follows.
The results show that except both the annual term and the Chandler term, other periodical terms of the polar motion have not been discovered in these both series.
In this paper, the external consistencies of both series have also been obtained. The results are 2.0 mas for xp and 2.1 mas for yp.
出处
《中国科学院上海天文台年刊》
1990年第11期13-18,共6页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
