Evaluation of COMPASS ionospheric grid
文献类型：期刊论文
| 作者 | Wu, Xiaoli1; Zhou, Jianhua1; Tang, Bo1; Cao, Yueling2 ; Fan, Jiachen1
|
| 刊名 | GPS SOLUTIONS
 |
| 出版日期 | 2014-10-01 |
| 卷号 | 18期号:4页码:639-649 |
| 关键词 | Satellite-based augmentation system (SBAS) Ionospheric grid point (IGP) COMPASS Wide-area augmentation system (WAAS) Accuracy Availability |
| 英文摘要 | As an important component of the augmentation service, the ionospheric grid contributes to improving single-frequency positioning accuracy. The ionospheric delay corrections are broadcast as vertical delay estimates at specified ionospheric grid points (IGPs) for most satellite-based augmentation system, where the IGPs are predefined with a resolution of 5A degrees and 5A degrees in latitude and longitude. Different from the general strategy, the COMPASS IGPs are predefined with a resolution of 2.5A degrees and 5A degrees in latitude and longitude. The need for this special IGPs distribution is investigated with experiments using real data. The performance of the COMPASS ionospheric grid is analyzed in terms of accuracy and availability. Comparing the performance of the special IGPs distribution with that of 5A degrees A xA 5A degrees IGPs, the results show that the ionospheric correction improves by 0.2 m and the 3D positioning accuracy improves by 1 m in middle-low latitude regions. The RMS of the COMPASS grid ionospheric correction accuracy is better than 0.5 m in most regions of the China mainland, and the availability is better than 95 % except in the northeast, northwest and outside China. In addition, we investigated the performance of the method that combined the inverse distance weighted and spherical harmonics grid modeling algorithm. Simulations show that the new method clearly improves grid availability. The mean availability in the mainland is better than 99 %. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Remote Sensing |
| 研究领域[WOS] | Remote Sensing |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000342151200015 |
| 源URL | [http://119.78.226.72/handle/331011/16123]  |
| 专题 | 上海天文台_天文地球动力学研究中心 上海天文台_VLBI研究室 |
| 作者单位 | 1.Beijing Satellite Nav Ctr, Beijing 100094, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Xiaoli,Zhou, Jianhua,Tang, Bo,et al. Evaluation of COMPASS ionospheric grid[J]. GPS SOLUTIONS,2014,18(4):639-649. |
| APA | Wu, Xiaoli,Zhou, Jianhua,Tang, Bo,Cao, Yueling,&Fan, Jiachen.(2014).Evaluation of COMPASS ionospheric grid.GPS SOLUTIONS,18(4),639-649. |
| MLA | Wu, Xiaoli,et al."Evaluation of COMPASS ionospheric grid".GPS SOLUTIONS 18.4(2014):639-649. |
入库方式： OAI收割
来源：上海天文台
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