NCEP/QSCAT混合风向用于SAR图像反演高分辨率海面风速

Sea Surface Wind Speeds Retrieval by SAR Combing with the NCEP/QSCAT Blended Wind Directions

SAR图像反演高分辨率海面风速在微波遥感领域具有重要的意义。利用SAR图像和NCEP/QSCAT混合风向数据,对NCEP/QSCAT混合风向用于SAR图像反演高分辨率海面风速的方法进行了初步研究。以2005年12月6日一景ENVISat ASAR图像为例,反演了大范围、高分辨率海面风速。海面风速的反演结果与NCEP/QSCAT混合风速、日平均散射计风速的比较结果显示,其均方根误差分别为1.9 m/s、1.6 m/s,二者符合较好,显示了SAR反演高分辨率海面风速的能力与SAR海面风场业务化应用的前景。

The high resolution sea surface wind speeds retrieval from SAR image is of great significance in the field of microwave remote sensing.A preliminary study about the high resolution sea surface wind speeds retrieval from SAR image combing with the NCEP/QSCAT blended sea surface wind directions was introduced.As a case study,this method was applied on one scene ENVISat ASAR imaging on Dec.6,2005.The retrieved wind speeds are compared with those from both the NCEP/QSCAT blended sea surface wind speeds and daily averaged Quick Scatter meter sea surface wind speeds.The results gave that they are in good agreement.The root-mean-square errors of wind speed are 1.9 m/s and 1.6 m/s respectively,which show that SAR has the ability of retrieving the high resolution sea surface wind speeds,and give the orientation of SAR sea surface wind field business application in future.