Preliminary Products of Precise Orbit Determination Using Satellite Laser Ranging Observations for ILRS AAC

被引:5
|
作者
Kim, Young-Rok [1 ]
Park, Sang-Young [1 ]
Park, Eun-Seo [2 ]
Lim, Hyung-Chul [2 ]
机构
[1] Yonsei Univ, Dept Astron, Astrodynam & Control Lab, Seoul 120749, South Korea
[2] Korea Astron & Space Sci Inst, Daejeon 305348, South Korea
关键词
precise orbit determination; satellite laser ranging; GEODYN II; LAGEOS; ETALON; International Laser Ranging Service Associate Analysis Center;
D O I
10.5140/JASS.2012.29.3.275
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this study, we present preliminary results of precise orbit determination (POD) using satellite laser ranging (SLR) observations for International Laser Ranging Service (ILRS) Associate Analysis Center (AAC). Using SLR normal point observations of LAGEOS-1, LAGEOS-2, ETALON-1, and ETALON-2, the NASA/GSFC GEODYN II software are utilized for POD. Weekly-based orbit determination strategy is applied to process SLR observations and the post-fit residuals check, and external orbit comparison are performed for orbit accuracy assessment. The root mean square (RMS) value of differences between observations and computations after final iteration of estimation process is used for post-fit residuals check. The result of ILRS consolidated prediction format (CPF) is used for external orbit comparison. Additionally, we performed the precision analysis of each ILRS station by post-fit residuals. The post-fit residuals results show that the precisions of the orbits of LAGEOS-1 and LAGEOS-2 are 0.9 and 1.3 cm, and those of ETALON-1 and ETALON-2 are 2.5 and 1.9 cm, respectively. The orbit assessment results by ILRS CPF show that the radial accuracies of LAGEOS-1 and LAGEOS-2 are 4.0 cm and 5.3 cm, and the radial accuracies of ETALON-1 and ETALON-2 are 30.7 cm and 7.2 cm. These results of station precision analysis confirm that the result of this study is reasonable to have implications as preliminary results for administrating ILRS AAC.
引用
收藏
页码:275 / 285
页数:11
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