Multipath error detection and correction for GEO/IGSO satellites
文献类型：期刊论文
| 作者 | Wu XiaoLi2; Zhou JianHua2; Wang Gang2; Hu XiaoGong1; Cao YueLing1 |
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2012 |
| 卷号 | 55期号:7页码:1297 |
| 关键词 | multipath error carrier smoothing pseudorange GEO satellite position error |
| ISSN号 | 1674-7348 |
| 英文摘要 | Constellations of regional satellite navigation systems are usually constituted of geostationary satellites (GEO) and inclined geostationary satellites (IGSO) for better service availability. Analysis of real data shows that the pseudorange measurements of these two types of satellites contain significant multipath errors and code noise, and the multipath for GEO is extremely serious, which is harmful to system services. In contrast, multipath error of carrier phase measurements is less than 3 cm, which is smaller than the multipath of pseudorange measurements by two orders of magnitude. Using a particular combination of pseudorange and dual-frequency carrier phase measurements, the pseudorange multipath errors are detected, and their time varying features are analyzed. A real-time multipath correction algorithm is proposed in this paper, which is called CNMC (Code Noise and Multipath Correction). The algorithm decreases the influence of the multipath error and therefore ensures the performance of the system. Data processing experiments show that the multipath error level may be reduced from 0. 5 m to 0. 15 m by using this algorithm, and 60% of GEO multipath errors and 42% of IGSO multipath errors are successfully corrected with CNMC. Positioning experiments are performed with a constellation of 3 GEO plus 3 IGSO satellites. For dual-frequency users the East-West position accuracy is improved from 1.31 m to 0.94 m by using the CNMC algorithm, the South-North position accuracy is improved from 2.62 m to 2.29 m, and the vertical position accuracy is improved from 4.25 m to 3.05 m. After correcting multipath errors, the three-dimensional position accuracy is improved from 5.16 m to 3.94 m. |
| 资助项目 | [National High Technology Research and Development Program of China (863)] ; [National Natural Science Foundation of China] ; [Science and Technology Commission of Shanghai] |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/57999]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国科学院国家天文台 2.Beijing Global Informat Applicat & Dev Ctr, Beijing 100094, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu XiaoLi,Zhou JianHua,Wang Gang,et al. Multipath error detection and correction for GEO/IGSO satellites[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2012,55(7):1297. |
| APA | Wu XiaoLi,Zhou JianHua,Wang Gang,Hu XiaoGong,&Cao YueLing.(2012).Multipath error detection and correction for GEO/IGSO satellites.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,55(7),1297. |
| MLA | Wu XiaoLi,et al."Multipath error detection and correction for GEO/IGSO satellites".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 55.7(2012):1297. |
入库方式： OAI收割
来源：国家天文台
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