| Simulation study on slant-to-vertical deviation in two dimensional TEC mapping over the ionosphere equatorial anomaly | |
Yu, Tao1,2 ; Ma, Tian2; Wang, Yungang2; Zeng, Zhongcao2; Xia, Chunliang1; Wu, Fenglei3; Weng, La4
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| 作者部门 | 光谱成像技术实验室 |
| 2014-08-15 | |
| 发表期刊 | ADVANCES IN SPACE RESEARCH
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| ISSN | 0273-1177 |
| 卷号 | 54期号:4页码:595-603 |
| 摘要 | With the rapid increase of GPS/GNSS receivers being deployed and operated in China, real-time GPS data from nearly a thousand sites are available at the National Center for Space Weather, China Meteorology Administration. However, it is challenging to generate a high-quality regional total electron content (TEC) map with the traditional two-dimensional (2-D) retrieval scheme because a large horizontal gradient has been reported over east south Asia due to the northern equatorial ionization anomaly. We developed an Ionosphere Data Assimilation Analysis System (IDAAS), which is described in this study, using an International Reference Ionosphere (IRI) model as the background and applying a Kalman filter for updated observations. The IDAAS can reconstruct a three-dimensional ionosphere with the GPS slant TEC. The inverse slant TEC correlates well with observations both for GPS sites involved in the reconstruction and sites that are not involved. Based on the IDAAS, simulations were performed to investigate the deviation relative to the slant-to-vertical conversion (STY). The results indicate that the relative deviation induced by slant-to-vertical conversion may be significant in certain instances, and the deviation varies from 0% to 40% when the elevation decreases from 90 to 150, while the relative IDAAS deviation is much smaller and varies from -5% to 15% without an elevation dependence. Compared with 'true TEC' map derived from the model, there is large difference in STV TEC map but no obvious discrepancy in IDAAS map. Generally, the IDAAS TEC map is much closer to the "true TEC" than is STY TEC map is. |
| 文章类型 | Article |
| 关键词 | Ionosphere Data Assimilation Deviation Tec Mapping Simulation Study |
| WOS标题词 | Science & Technology ; Physical Sciences |
| DOI | 10.1016/j.asr.2014.04.015 |
| 收录类别 | SCI ; EI |
| 关键词[WOS] | GLOBAL POSITIONING SYSTEM ; TOTAL ELECTRON-CONTENT ; GPS DATA ; TOMOGRAPHY ; MODEL ; ALGORITHM |
| 语种 | 英语 |
| WOS研究方向 | Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
| WOS类目 | Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000339692800004 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.opt.ac.cn/handle/181661/22240 |
| 专题 | 光谱成像技术研究室 |
| 作者单位 | 1.China Univ Geosci Wuhan, Wuhan 430074, Peoples R China 2.China Meteorol Adm, Natl Ctr Space Weather, Beijing 10081, Peoples R China 3.Beijing Aerosp Control Ctr, Beijing, Peoples R China 4.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Tao,Ma, Tian,Wang, Yungang,et al. Simulation study on slant-to-vertical deviation in two dimensional TEC mapping over the ionosphere equatorial anomaly[J]. ADVANCES IN SPACE RESEARCH,2014,54(4):595-603. |
| APA | Yu, Tao.,Ma, Tian.,Wang, Yungang.,Zeng, Zhongcao.,Xia, Chunliang.,...&Weng, La.(2014).Simulation study on slant-to-vertical deviation in two dimensional TEC mapping over the ionosphere equatorial anomaly.ADVANCES IN SPACE RESEARCH,54(4),595-603. |
| MLA | Yu, Tao,et al."Simulation study on slant-to-vertical deviation in two dimensional TEC mapping over the ionosphere equatorial anomaly".ADVANCES IN SPACE RESEARCH 54.4(2014):595-603. |
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