A new solution assessment approach and its application to space geodesy data analysis
文献类型：期刊论文
| 作者 | Hu, X ; Huang, C; Liao, X
|
| 刊名 | CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY
 |
| 出版日期 | 2001 |
| 卷号 | 81期号:4页码:265-278 |
| 关键词 | solution assessment space geodesy data analysis |
| 英文摘要 | The statistics of the residuals are used in this paper to perform a quality assessment of the solutions from space geodesy data analysis. With the stochastic estimation and the relatively arbitrary empirical parameters being employed to absorb unmodelled errors, it has long been noticed that different estimate combinations or analysis strategies may achieve the same level of fitting yet result in significantly different solutions. Based on the postulate that no conceivable signals should remain in the residuals, solutions of the same level of root mean square error (RMS) and variance-covariance may be differentiated in the sense that for reasonable solutions, the residuals a-re virtually identical with noise. While it is possible to develop complex noise models, the Gaussian white noise model simplifies the solution interpretation and implies the unmodelled errors have been smoothed out. Statistical moments of the residuals as well as the Pearson chi-square are computed in this paper to measure the discrepancies between the residuals and Gaussian white noise. Applying to both satellite laser ranging (SLR) and global positioning system (GPS) data analysis, we evaluate different parameter estimate combinations and/or different strategies that would be hardly discriminated by the level of fitting. Unlike most solution assessment methods broadly termed as external comparison, no information independent of the data analyzed is required. This makes the immediate solution assessment possible and easy to carry out. While the external comparison is the best and most convincing quality assessment of the solution, the statistics of the residuals provide important information on the solutions and, in some cases as discussed in this paper, can be supported with external comparison. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics ; Mathematics, Interdisciplinary Applications |
| 研究领域[WOS] | Astronomy & Astrophysics ; Mathematics |
| 关键词[WOS] | GPS ; COMBINATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000173686200001 |
| 公开日期 | 2010-07-30 |
| 源URL | [http://119.78.226.72//handle/331011/10928]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | Chinese Acad Sci, Shanghai Astron Observ, Ctr Astrogeodynam Res, Beijing 100864, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, X,Huang, C,Liao, X. A new solution assessment approach and its application to space geodesy data analysis[J]. CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY,2001,81(4):265-278. |
| APA | Hu, X,Huang, C,&Liao, X.(2001).A new solution assessment approach and its application to space geodesy data analysis.CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY,81(4),265-278. |
| MLA | Hu, X,et al."A new solution assessment approach and its application to space geodesy data analysis".CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY 81.4(2001):265-278. |
入库方式： OAI收割
来源：上海天文台
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