Evaluation and Validation of CryoSat-2-Derived Water Levels Using In Situ Lake Data from China
文献类型：期刊论文
| 作者 | Liu, Zhaofei; Yao, Zhijun; Wang, Rui |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2019-04-02 |
| 卷号 | 11期号:8页码:16 |
| 关键词 | altimetry water level CryoSat-2 outlier lake in situ gauge |
| ISSN号 | 2072-4292 |
| DOI | 10.3390/rs11080899 |
| 通讯作者 | Liu, Zhaofei(zfliu@igsnrr.ac.cn) |
| 英文摘要 | CryoSat-2 altimetry has become a valuable tool for monitoring the water level of lakes. In this study, a concentrated probability density function (PDF) method was proposed for preprocessing CryoSat-2 Geophysical Data Record (GDR) data. CryoSat-2 altimetry water levels were preprocessed and evaluated by in situ gauge data from 12 lakes in China. Results showed that the accuracy of the raw GDR data was limited due to outliers in most of the along-track segments. The outliers were generally significantly lower than the in situ values by several meters, and some by more than 30 m. Outlier detection, therefore, improves upon the accuracy of CryoSat-2 measurements. The concentrated PDF method was able to greatly improve the accuracy of CryoSat-2 measurements. The preprocessed CryoSat-2 measurements were able to observe lake levels with a high accuracy at nine of the twelve lakes, with an absolute mean difference of 0.09 m, an absolute standard deviation difference of 0.04 m, a mean root mean square error of 0.27 m, and a mean correlation coefficient of 0.84. Overall, the accuracy of CryoSat-2-derived lake levels was validated in China. In addition, the accuracy of Database for Hydrological Time Series of Inland Waters (DAHITI) and HYDROWEB water level products was also validated by in situ gauge data. |
| WOS关键词 | RADAR ALTIMETER ; TIBETAN PLATEAU ; ENVISAT ; OUTLIERS ; COASTAL ; OCEAN ; MODE |
| 资助项目 | National Natural Science Foundation of China[41571027] ; National Natural Science Foundation of China[41561144012] ; National Natural Science Foundation of China[41661144030] |
| WOS研究方向 | Remote Sensing |
| 语种 | 英语 |
| WOS记录号 | WOS:000467646800009 |
| 出版者 | MDPI |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/59682]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Zhaofei |
| 作者单位 | Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zhaofei,Yao, Zhijun,Wang, Rui. Evaluation and Validation of CryoSat-2-Derived Water Levels Using In Situ Lake Data from China[J]. REMOTE SENSING,2019,11(8):16. |
| APA | Liu, Zhaofei,Yao, Zhijun,&Wang, Rui.(2019).Evaluation and Validation of CryoSat-2-Derived Water Levels Using In Situ Lake Data from China.REMOTE SENSING,11(8),16. |
| MLA | Liu, Zhaofei,et al."Evaluation and Validation of CryoSat-2-Derived Water Levels Using In Situ Lake Data from China".REMOTE SENSING 11.8(2019):16. |
入库方式： OAI收割
来源：地理科学与资源研究所
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