Significant Wave Height Estimation from Joint CYGNSS DDMA and LES Observations

有效波高 浮标 波高 均方误差 全球导航卫星系统应用 相关系数 海况 高度计 气象学 卫星 环境科学 遥感 风浪 数学 地理 地质学 统计 工程类 海洋学 航空航天工程 考古
作者
Shuai Yang,Shuanggen Jin,Yan Jia,Mingda Ye
出处
期刊:Sensors [Multidisciplinary Digital Publishing Institute]
卷期号:21 (18): 6123-6123 被引量:11
标识
DOI:10.3390/s21186123
摘要

The significant wave height (SWH) of oceans is the main parameter in describing the sea state, which has been widely used in the establishment of ocean process models and the field of navigation and transportation. However, traditional methods such as satellite radar altimeters and buoys cannot achieve SWH estimations with high spatial and temporal resolution. Recently, the spaceborne Global Navigation Satellite System reflectometry (GNSS-R) has provided an opportunity to estimate SWH with a rapid global coverage and high temporal resolution observations, particularly with the Cyclone Global Navigation Satellite System (CYGNSS) mission. In this paper, SWH was estimated using the polynomial function relationship between SWH from ERA5 and Delay-Doppler Map Average (DDMA) as well as Leading Edge Slope (LES) from CYGNSS data. Then, the SWH estimated from CYGNSS data was validated by ERA-Interim data, AVISO data, and buoy data. The results showed that the average correlation coefficient of CYGNSS SWH was 0.945, and the average RMSE was 0.257 m when compared to the ERA-Interim SWH data. The RMSE was 0.423 m and the correlation coefficient was 0.849 when compared with the AVISO SWH. The correlation coefficient with the buoy data was 0.907, and the RMSE was 0.247 m. This method can provide suitable SWH estimation data for ocean dynamics research and ocean environment prediction.
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