基于微波多载荷优势互补的海面风场联合反演方法研究  

Research on Wind Field Joint Inversion Method Based on Microwave Multi Load Complementary Advantages

作　　者：万勇[1] 刘燕[1] WAN Yong;LIU Yan(College of Ocean and Spatial Information,China University of Petroleum(East China),Qingdao 266061,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266061

出　　处：《海洋技术学报》2022年第6期58-65,共8页Journal of Ocean Technology

基　　金：国家自然科学基金资助项目(6193000212)。

摘　　要：海面风场的遥感探测主要通过合成孔径雷达(Synthetic Aperture Radar,SAR)和微波散射计等微波遥感器进行,近年来波谱仪也可用来探测风场信息。各遥感器独立工作,具有不同的入射角、覆盖范围和分辨率,在风场探测方面各有其优势和局限性。本文基于各类微波遥感器独特的观测方式,根据各自的时空匹配规则,相互借助实现3种载荷的两两联合,波谱仪和散射计分别与SAR联合为其提供风向并得到SAR的风速结果,与ERA5的均方根误差分别为1.9727 m/s和1.9860 m/s,散射计与波谱仪相互联合为波谱仪去除风向模糊,去模糊的风向结果为26.7589°,都符合目前风场反演公认的标准,风速和风向的均方根误差小于2 m/s和30°。本文解决了现阶段单模式观测风场的缺陷,为我国未来发射SAR、散射计、波谱仪多载荷卫星的风场反演提供互补信息的支持,为实现多载荷区域大范围高精度风场研究做准备。The remote sensing detection of sea surface wind field is mainly carried out by microwave remote sensors such as synthetic aperture radar(Synthetic Aperture Radar,SAR)and microwave scatterometer.In recent years,spectrometers can also be used to detect wind field information.Each remote sensor works independently with different incident angles,coverage and resolution,and has its own advantages and limitations in wind field detection.In this paper,based on the unique observation methods of various microwave remote sensors,according to their respective spatio-temporal matching rules,the two pairs of three kinds of loads are combined with each other.The spectrometer and scatterometer are combined with SAR to provide the wind direction and obtain the wind speed results of SAR.The root mean square errors with ERA5 are 1.9727 m/s and 1.9860 m/s,respectively.The scatterometer and spectrometer are combined with each other to remove the ambiguity of wind direction for the spectrometer.The deblurring wind direction results are 26.7689°,which are in line with the recognized standards of wind field inversion.The root mean square errors of wind speed and wind direction are less than2 m/s and 30°.This paper solves the defects of single-mode observation of wind field at present,provides complementary information support for the wind field inversion of multi-load satellites launched by SAR,scatterometer and spectrometer in the future in China,and prepares for the realization of large-scale and high-precision wind field research in multi-load regions.

关 键 词：SAR 波谱仪 散射计 时空匹配 风场联合反演 

分 类 号：P715.6[天文地球—海洋科学]