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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Evaluating Chinese HY-2B HSCAT Ocean Wind Products Using Buoys and Other Scatterometers
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Evaluating Chinese HY-2B HSCAT Ocean Wind Products Using Buoys and Other Scatterometers

机译：使用浮标和其他散射仪评估中国HY-2B HSCAT海洋风产品

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摘要

This letter preliminarily assesses the accuracy of ocean wind products from the Ku-band scatterometer (HSCAT) onboard the recently launched Chinese satellite HY-2B. The wind vectors derived from HSCAT during the period from November 15, 2018 to April 30, 2019 are evaluated. The reference wind data include in situ measurements from the offshore meteorological buoys of the National Data Buoy Center, USA, and westerlies mooring of the National Ocean Technology Center, China, and scatterometer winds from the European Advanced Scatterometer (ASCAT) and Indian SCATSAT-1 Oceansat Scatterometer (OSCAT). The spatial difference is limited to 25/root 2 km, while the HSCAT winds are temporally collocated with buoys and other scatterometers by less than 0.5 and 1.5 h, respectively. The comparison results show that the HSCAT data have a root-mean-square error (RMSE) of 0.95-1.20 m/s (14.7 degrees-25.7 degrees) regarding the wind speed and direction, respectively, indicating consistency between the HSCAT winds and the reference. Furthermore, better agreement is found for the HY-2B HSCAT winds processed using the Pencil-beam Wind Processor (PWP) algorithm, regarding wind speed (RMSE of 0.95-1.07 m/s) and particularly with respective to the wind direction (RMSE of 14.7 degrees-19.6 degrees), both satisfying the mission specification (<2 m/s and <20 for wind speed and direction, respectively). The encouraging validation results over the first 5 months demonstrate that the HY-2B HSCAT wind products will be useful for the scientific community.
机译：这封信预先评估了最近推出了中国卫星HY-2B的KU波段散射仪（HSCAT）的海洋风产品的准确性。评估了2018年11月15日至2019年4月30日期间的HSCAT的风矢量。参考风数据包括来自国家数据浮标中心，美国和Westerlies的海洋气象浮标的原位测量，来自欧洲先进散射仪（Acquat）和印度Scatsat-1的国家海洋技术中心和散射仪风的系泊Oceansat散射计（OSCAT）。空间差异限于25 /根2km，而HSCAT风在浮标和其他散射仪中分别暂时地与浮标和其他散射仪分别分别小于0.5和1.5小时。比较结果表明，HSCAT数据分别具有0.95-1.20 m / s（14.7度-25.7度）的根均方误差（RMSE），分别表示风速和方向，表示HSCAT风之间的一致性和参考。此外，使用铅笔束风处理器（PWP）算法处理的HY-2B HSCAT风力有关风速（RMSE为0.95-1.07 m / s），特别是与风向相应（RMSE 14.7度-19.6度），均满足任务规范（分别为风速和方向的<2 m / s和<20）。前5个月的令人鼓舞的验证结果表明HY-2B HSCAT风产品对科学界有用。

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