| HY-2B卫星载荷联合观测海面阵风的一种反演方法 |
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| 引用本文： | 张有广,蒋城飞,贾永君,马小峰.HY-2B卫星载荷联合观测海面阵风的一种反演方法[J].海洋学报,2022,44(11):133-143. |
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| 作者姓名： | 张有广 蒋城飞 贾永君 马小峰 |
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| 作者单位： | 1.南方海洋科学与工程广东省实验室（广州），广东 广州 511485 |
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| 基金项目： | 南方海洋科学与工程广东省实验室（广州）人才团队引进重大专项（GML2019ZD0302） |
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| 摘 要： | 国内外对海上阵风的研究并不多，且大多集中在阵风预报和应用研究方面，对于海洋阵风数据的获取技术未见文献系统论述。本文利用HY-2B卫星雷达高度计观测的后向散射系数，结合校正微波辐射计观测的亮度温度信息，提出联合反演阵风风速的方法。两个遥感载荷联合反演得到的阵风风速与2019–2021年美国国家浮标数据中心（NDBC）浮标数据进行真实性检验，结果显示:阵风风速均方根误差（RMSE）为0.98 m/s，相关系数为0.82；基于本方法利用国外同类卫星Jason-3得到的阵风风速与2016–2018年NDBC浮标数据的RMSE为0.96 m/s，相关系数为0.88。本文在HY-2B卫星雷达高度计海面风速观测的基础上，纳入同一卫星平台校正微波辐射计的同步观测信息联合实现了海面阵风的观测，数据的比对结果证明文中方法具有较高的观测精度。同时，该方法对于具有相同观测体制的国内外卫星也适用。
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| 关 键 词： | HY-2B卫星 雷达高度计 校正微波辐射计 海面阵风 反演方法 |
| 收稿时间： | 2022-02-15 |
An inversion method for joint observation of wind gusts by HY-2B satellite remote sensors |
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| Institution: | 1.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511485, China2.National Satellite Ocean Application Service, Beijing 100081, China |
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| Abstract: | There are few researches on offshore gusts at home and abroad, and most of them focus on gust prediction and application research. There is no systematic discussion on the acquisition technology of wind gust data. Based on the backscattering coefficient observed by HY-2B satellite radar altimeter and the brightness temperature information observed by correction microwave radiometer, a method for retrieving gust wind speed is proposed in this paper. The gust wind speed obtained from the joint inversion of the two remote sensing sensors is verified with the National Data Buoy Center (NDBC) buoy data from 2019 to 2021. The results show that the gust wind speed root mean square error (RMSE) is 0.98 m/s and the correlation coefficient is 0.82. The RMSE of the gust wind speed obtained based on the method using a similar satellite Jason-3 is 0.96 m/s and the correlation coefficient is 0.88. Based on the observation of sea surface wind speed with HY-2B satellite radar altimeter and the synchronous observation information of correction microwave radiometer by satellite platform, the observation of sea surface wind gust is realized jointly. The comparison results of data show that the method in this paper has high observation accuracy. At the same time, this method is also applicable to domestic and foreign satellites with the same observation system. This provides a simple and reliable means of ocean remote sensing technology for the current situation of insufficient observation capacity of offshore wind gust. |
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