Evaluation of COMPASS ionospheric model in GNSS positioning
文献类型：期刊论文
| 作者 | Wu, Xiaoli1; Hu, Xiaogong2 ; Wang, Gang1; Zhong, Huijuan3; Tang, Chengpan2
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| 刊名 | ADVANCES IN SPACE RESEARCH
 |
| 出版日期 | 2013-03-15 |
| 卷号 | 51期号:6页码:959-968 |
| 关键词 | COMPASS GNSS Ionospheric model Positioning accuracy |
| 英文摘要 | As important products of GNSS navigation message, ionospheric delay model parameters are broadcasted for single-frequency users to improve their positioning accuracy. GPS provides daily Klobuchar ionospheric model parameters based on geomagnetic reference frame, while the regional satellite navigation system of China's COMPASS broadcasts an eight-parameter ionospheric model, COMPASS Ionospheric Model(CIM), which was generated by processing data from continuous monitoring stations, with updating the parameters every 2 h. To evaluate its performance, CIM predictions are compared to ionospheric delay measurements, along with GPS positioning accuracy comparisons. Real observed data analysis indicates that CIM provides higher correction precision in middle-latitude regions, but relatively lower correction precision for low-latitude regions where the ionosphere has much higher variability. CIM errors for some users show a common bias for in-coming COMPASS signals from different satellites, and hence ionospheric model errors are somehow translated into the receivers' clock error estimation. In addition, the CIM from the China regional monitoring network are further evaluated for global ionospheric corrections. Results show that in the Northern Hemisphere areas including Asia, Europe and North America, the three-dimensional positioning accuracy using the CIM for ionospheric delay corrections is improved by 7.8%-35.3% when compared to GPS single-frequency positioning ionospheric delay corrections using the Klobuchar model. However, the positioning accuracy in the Southern Hemisphere is degraded due apparently to the lack of monitoring stations there. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 研究领域[WOS] | Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
| 关键词[WOS] | GPS OBSERVATIONS ; USERS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000316429400004 |
| 源URL | [http://119.78.226.72/handle/331011/18029]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | 1.Beijing Global Informat Ctr Applicat & Explorat, Beijing 100094, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.China Def Sci Technol Informat Ctr, Beijing 100142, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Xiaoli,Hu, Xiaogong,Wang, Gang,et al. Evaluation of COMPASS ionospheric model in GNSS positioning[J]. ADVANCES IN SPACE RESEARCH,2013,51(6):959-968. |
| APA | Wu, Xiaoli,Hu, Xiaogong,Wang, Gang,Zhong, Huijuan,&Tang, Chengpan.(2013).Evaluation of COMPASS ionospheric model in GNSS positioning.ADVANCES IN SPACE RESEARCH,51(6),959-968. |
| MLA | Wu, Xiaoli,et al."Evaluation of COMPASS ionospheric model in GNSS positioning".ADVANCES IN SPACE RESEARCH 51.6(2013):959-968. |
入库方式： OAI收割
来源：上海天文台
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