y The impacts of source structure on geodetic parameters demonstrated by the radio source 3C371
文献类型：期刊论文
| 作者 | Xu, Ming H.2,3; Heinkelmann, Robert2; Anderson, James M.2; Mora-Diaz, Julian2; Karbon, Maria2; Schuh, Harald1,2; Wang, Guang L.3 |
| 刊名 | JOURNAL OF GEODESY
 |
| 出版日期 | 2017-07-01 |
| 卷号 | 91期号:7页码:767-781 |
| 关键词 | Source Structure Effect Structure Index Vlbi Cont14 Quasars: Individual (3c371) |
| ISSN号 | 0949-7714 |
| DOI | 10.1007/s00190-016-0990-x |
| 英文摘要 | Closure quantities measured by very-long-baseline interferometry (VLBI) observations are independent of instrumental and propagation instabilities and antenna gain factors, but are sensitive to source structure. A new method is proposed to calculate a structure index based on the median values of closure quantities rather than the brightness distribution of a source. The results are comparable to structure indices based on imaging observations at other epochs and demonstrate the flexibility of deriving structure indices from exactly the same observations as used for geodetic analysis and without imaging analysis. A three-component model for the structure of source 3C371 is developed by model-fitting closure phases. It provides a real case of tracing how the structure effect identified by closure phases in the same observations as the delay observables affects the geodetic analysis, and investigating which geodetic parameters are corrupted to what extent by the structure effect. Using the resulting structure correction based on the three-component model of source 3C371, two solutions, with and without correcting the structure effect, are made. With corrections, the overall rms of this source is reduced by 1 ps, and the impacts of the structure effect introduced by this single source are up to 1.4 mm on station positions and up to 4.4 microarcseconds on Earth orientation parameters. This study is considered as a starting point for handling the source structure effect on geodetic VLBI from geodetic sessions themselves. |
| WOS研究方向 | Geochemistry & Geophysics ; Remote Sensing |
| 语种 | 英语 |
| WOS记录号 | WOS:000403720900007 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.226.72/handle/331011/32603]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Xu, Ming H. |
| 作者单位 | 1.Tech Univ Berlin, Inst Geodesy & Geoinformat Sci, Str 17 Juni 135, D-10623 Berlin, Germany 2.GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, D-14473 Potsdam, Germany 3.Chinese Acad Sci, Shanghai Astron Observ, CAS Key Lab Planetary Sci, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Ming H.,Heinkelmann, Robert,Anderson, James M.,et al. y The impacts of source structure on geodetic parameters demonstrated by the radio source 3C371[J]. JOURNAL OF GEODESY,2017,91(7):767-781. |
| APA | Xu, Ming H..,Heinkelmann, Robert.,Anderson, James M..,Mora-Diaz, Julian.,Karbon, Maria.,...&Wang, Guang L..(2017).y The impacts of source structure on geodetic parameters demonstrated by the radio source 3C371.JOURNAL OF GEODESY,91(7),767-781. |
| MLA | Xu, Ming H.,et al."y The impacts of source structure on geodetic parameters demonstrated by the radio source 3C371".JOURNAL OF GEODESY 91.7(2017):767-781. |
入库方式： OAI收割
来源：上海天文台
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