摘要
作为新成立的国际地球自转服务IERS的全球卫星激光测距SLR资料的分析处理中心,我们用新建立的SHORDEl卫星定轨和卫星测地程序系统处理了MERIT联测后1984年11月—1988年1月的LAGEOS卫星的全球SLR资料,归算了ERP(sHA)87L01地球自转参数序列.该序列的内符精度为:x_p——1.3mas,y_p——1.2mas,D_R——0.07ms/day,十天内轨道拟合全球观测资料的整体中误差约为10厘米.将该序列与美国Texas大学空间研究中心(CSR)归算的相应序列进行比较,其外符精度为:x_p——1.6mas,y_p——1.7mas,D_R——0.14ms/day.本文还介绍了为提高解算精度,SHORDE1程序在厘米级参考系的实现和力学因素模制方面的特点;以及为了提高解的稳定性,节省计算机的机时和内存,我们设计应用了命名为"多级复弧法"的估计算法.
As one of the Analysis Centers of SLR global data, we have processed the three year Lageos SLR global data from Nov. 1984 to Jan. 1988 after MERIT main campaign with the developed Shanghai Observatory Orbit determination Program SHORDE 1, and obtained a series of ERP(SHA)87L01. The internal precision of this series are approximately 1.3 mas for x_p, 1.2 mas for y_p and 0.07 ms/day for D_R, and the overall RMS fit of SLR observations to the orbits in 10 day arc is generally about 10 cm. The comparison of SHORDE 1 results with UTOPIA (CSR Texas University at Austin) for that ERP solution series has been shown in Fig. 2—5. The external precision for this comparison are 1.6 mas for x_p, 1.7 mas for y_p and 0.16 ms/day for D_R. In this paper we also introduce the speciality of the SHORDE 1 in the realization of the reference system and the force modelling for the cm-level in order to obtain higher processing precision, and the adopted estimation algorithm named multistage-multiarc technique in order to obtain the stable and reliable solution and to save running time and storage of the computer.
出处
《天文学报》
CSCD
北大核心
1989年第3期294-309,共16页
Acta Astronomica Sinica
