摘要
利用上海天文台的SHORDE1软件对约 3年左右 (MJD4 90 0 1.1-MJD50 10 9.6 )的全球SLR资料进行了归算 ,并将所得的极移序列和相应历元的国际地球自转服务中心 (IERS)给出的极移序列作了比较 ,分析结果表明 :上海天文台基于SLR资料的极移序列与IERS极移序列之间存在一定程度的系统偏差。该系统差具有明显的周期特性 ,周期约为 4 2 7天 ,振幅为 1mas左右。
A mathematical model is put forward to determine the potential systematic errors between two polar motion series. Using this model, analysis of systematic error between two specific polar motion series was carried out. One polar motion series is from Shanghai Astronomical Observatory, which is obtained from global solution of SLR data between Jan.14,1993 and Jan.27,1996, while the other is from IERS, which spans the same period. Lastly, parameters involved in the mathematical model are optimally estimated through weighted least squares adjustment. Periodic systematic errors are detected and estimated, period being 427 days with amplitude of 1 mas.
出处
《中国科学院上海天文台年刊》
2000年第21期19-23,共5页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
基金
国家自然科学基金重点项目!(198330 30 )
中国科学院"九五"重大项目!(KJ951- 1- 30 4 )的资助
关键词
天文地球动力学
国际地球自转服务
国际极移服务
数学模型
归算
系统偏差
astrogeodynamics - International Earth Rotation Service (IERS) - International Latitude Service (ILS) - polar motion
