Application of variance component estimation to precise orbit determination for ERS-2

	Application of variance component estimation to precise orbit determination for ERS-2
	Zhang, FP ; Huang, C; Feng, CG ; Dong, XJ ; Liao, XH
刊名	CHINESE ASTRONOMY AND ASTROPHYSICS
	2001-10-01
卷号	25 期号:4 页码:478-489
关键词	precise orbit determination variance component estimation data weighting
英文摘要	Variance component estimation (VCE) is applied to precise orbit determination (POD) of the ERS-2 satellite. Twenty 5-day long arcs in the early three months in 1998 were calculated using the SLR and PRARE data. In the data the adjacent arcs overlap for two days except the intervals for orbit maneuver. The effect of WE orbit determination on the calculation is investigated by an analysis of residuals and comparison of overlapping arcs, and the mean a posteriori standard deviation of each group of measured residuals is given. It is shown by the residuals analysis that the fitting of the measurements is significantly improved by VCD. However, according to Abbey criterion, VCD is not able to eliminate the systematic errors due to errors in the dynamic and geometric models. The results of the comparison of the overlapping arcs show that (1) WE reduces the mean range deviation of overlapping arcs, especially where there are obviously unreasonable deviations, so that the orbit obtained has a more uniform precision; (2) By using VCE, adjacent arcs tend to close up and this is more apparent in the transverse direction. From the mean a posteriori standard error of each group of measurements, it can be seen that as far as the single normal point measurement is concerned, the data of some SLR stations are more important than other measurements in POD calculation. Generally speaking, determination of weighting by using VCE is more reasonable than by using initial standard deviation.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
收录类别	SCI
语种	英语
WOS记录号	WOS:000172661300011
公开日期	2010-07-30
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/10936]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Acad Sinica, Shanghai Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Zhang, FP,Huang, C,Feng, CG,et al. Application of variance component estimation to precise orbit determination for ERS-2[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2001,25(4):478-489.
APA	Zhang, FP,Huang, C,Feng, CG,Dong, XJ,&Liao, XH.(2001).Application of variance component estimation to precise orbit determination for ERS-2.CHINESE ASTRONOMY AND ASTROPHYSICS,25(4),478-489.
MLA	Zhang, FP,et al."Application of variance component estimation to precise orbit determination for ERS-2".CHINESE ASTRONOMY AND ASTROPHYSICS 25.4(2001):478-489.