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| DOI | 10.1109/LGRS.2024.3391313 |
| Lake Water Level Estimation From Grazing GNSS-Reflectometry and Satellite Radar Altimetry Over the Great Lakes | |
| 发表日期 | 2024 |
| ISSN | 1545-598X |
| EISSN | 1558-0571 |
| 起始页码 | 21 |
| 卷号 | 21 |
| 英文摘要 | Monitoring the dynamics and surface conditions of lakes is essential for the understanding of climate change dynamics. Lake water level (LWL) is one of the variables that needs a particular vigilance, requiring a global and consistent monitoring that can be achieved by spaceborne remote sensing. Satellite radar altimetry has been widely used in the monitoring of inland waters in the past decades, with recent great improvements in the spatial resolution through the new generation of synthetic aperture radar (SAR) altimeters. However, current radar altimetry constellations limit the space-time sampling necessary for a systematic and regular mapping of lakes. GNSS-reflectometry (GNSS-R) could provide complementary observations to densify the spatiotemporal coverage, allowing hydrologists to access to finer details on the lake surface evolution. In particular, grazing GNSS-R broadens the use of opportunistic GNSS signals due to the smaller elevation angles of the reflecting signals. In this letter, we address this issue by comparing the altimetry profiles over Great Lakes of grazing GNSS-R data provided by Spire constellation satellites and SAR altimeter data provided by Sentinel-3 (S-3) constellation satellites, as a first approach in preparation of intertechniques hydrology LWL products. This letter confirms the advantages of fusing observations from both types of remote sensing techniques attaining a precision in LWL estimations better than 6 cm, provided that an accurate regional geoid model is available. Furthermore, GNSS-R data could also provide an independent LWL information to validate the radar altimetry measurements over sites, which are not equipped with ground means. |
| 英文关键词 | Climate change; CubeSat; CubeSats; GNSS-reflectometry (GNSS-R); hydrology; lake water level (LWL); radar altimetry; remote sensing; Sentinel-3 (S-3); spire constellation |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology |
| WOS类目 | Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology |
| WOS记录号 | WOS:001215334400001 |
| 来源期刊 | IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/289130 |
| 作者单位 | Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Instituto de Ciencias del Espacio (ICE); Institut d'Estudis Espacials de Catalunya (IEEC); European Space Agency |
| 推荐引用方式 GB/T 7714 | . Lake Water Level Estimation From Grazing GNSS-Reflectometry and Satellite Radar Altimetry Over the Great Lakes[J],2024,21. |
| APA | (2024).Lake Water Level Estimation From Grazing GNSS-Reflectometry and Satellite Radar Altimetry Over the Great Lakes.IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,21. |
| MLA | "Lake Water Level Estimation From Grazing GNSS-Reflectometry and Satellite Radar Altimetry Over the Great Lakes".IEEE GEOSCIENCE AND REMOTE SENSING LETTERS 21(2024). |
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