Ionospheric Nighttime Enhancements at Low Latitudes Challenge Performance of the Global Ionospheric Maps
文献类型：期刊论文
| 作者 | Yang, Yuyan1,2,3; Liu, Libo1,2,3; Zhao, Xiukuan1,3; Xie, Haiyong1,3; Chen, Yiding1,2,4; Le, Huijun1,2,3; Zhang, Ruilong1,2,3; Tariq, M. Arslan1,2,3,5; Li, Wenbo1,2,3 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 14期号:5页码:16 |
| 关键词 | ionosphere ionospheric nighttime enhancement (INE) Beidou geostationary orbit (GEO) total electron content (TEC) Global Ionospheric Map (GIM) ionosonde |
| DOI | 10.3390/rs14051088 |
| 英文摘要 | In this study, two ionospheric nighttime enhancement (INE) events at low latitudes are selected to investigate their spatial features through the observations from Global Navigation Satellite System (GNSS) receivers and ionosondes. For the first time, we present the detailed spatial pictures of premidnight and postmidnight INEs under geomagnetically quiet conditions. The two INE events have the maximum extents of about 11 degrees x 34 degrees and 17 degrees x 25 degrees (longitude x latitude), respectively. Dramatic latitudinal and longitudinal features are revealed in the two INEs. We perform a comparison between the products of Global Ionospheric Maps (GIMs) and total electron content (TEC) measurement from GNSS receivers. However, GIMs fail to capture the TEC distribution during INEs owing to their limited spatial and temporal resolution. Considering the extent of INEs from the observations, the spherical harmonic (SH) expansion adopted by the GIM models needs to upgrade the degree and order to 36. The pixel-based methods developed from two GIM models are required to reduce their grid size for higher spatial resolution. The recommended time interval is shorter than 30 min. Among seven GIMs, CODG and JPLG maps generally have the best performance in reproducing the latitudinal structure of the ionosphere. |
| WOS关键词 | TOTAL ELECTRON-CONTENT ; POSTMIDNIGHT ENHANCEMENT ; NMF2 ; TEC ; SOLAR ; MORPHOLOGY ; INCREASES ; DENSITY ; REGION ; PEAKS |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000768480400001 |
| 出版者 | MDPI |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/104997]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Liu, Libo |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Heilongjiang Mohe Observ Geophys, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Beijing Natl Observ Space Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Natl Ctr Phys, Ctr Earthquake Studies, Islamabad 44000, Pakistan |
| 推荐引用方式 GB/T 7714 | Yang, Yuyan,Liu, Libo,Zhao, Xiukuan,et al. Ionospheric Nighttime Enhancements at Low Latitudes Challenge Performance of the Global Ionospheric Maps[J]. REMOTE SENSING,2022,14(5):16. |
| APA | Yang, Yuyan.,Liu, Libo.,Zhao, Xiukuan.,Xie, Haiyong.,Chen, Yiding.,...&Li, Wenbo.(2022).Ionospheric Nighttime Enhancements at Low Latitudes Challenge Performance of the Global Ionospheric Maps.REMOTE SENSING,14(5),16. |
| MLA | Yang, Yuyan,et al."Ionospheric Nighttime Enhancements at Low Latitudes Challenge Performance of the Global Ionospheric Maps".REMOTE SENSING 14.5(2022):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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