SLR资料解算地球自转短周期变化的协方差分析  

THE COVARIANCE ANALYSIS ON THE SUB-DAILY TERM OF EARTHS ROTATION WITH SLR

作　　者：胡小工[1] 冯初刚[1] 黄王成 

机构地区：[1]中国科学院上海天文台天文地球动力学中心,上海200030

出　　处：《中国科学院上海天文台年刊》2000年第21期5-12,共8页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

摘　　要：采用统计定轨理论中的协方差分析方法讨论了卫星激光测距资料解算地球自转的短周期变化(sub -daily)可达到的内符和外符精度。建立协方差分析的Givens -Gentlemen正交变换算法 ,并将精密定轨和参数解算理论中的多级复弧法推广到协方差分析中。同时考察不解算地球自转的短周期变化时 ,其误差对精密定轨和解算地球自转参数的影响。Based on the theory of covariance analysis, the achievable precision of the solution of the sub-daily term(SDT) of Earth's rotation with SLR is assessed. An efficient covariance analysis algorithm of Givens-Gentleman orthogonal transformation is developed, and the data reduction technique of multi-arc method is utilized. As an example of application, the error of the Earth gravational coefficient GM on SDT solution is considered. Also, to determine the solvability of SDT with SLR, the case of treating SDT as consider parameters is analyzed.

关 键 词：协方差分析 天文地球动力学 地球自转参数 周日项 短周期项 SLR资料 

分 类 号：P183.31[天文地球—天文学]