中法海洋卫星微波散射计近海岸产品在台风遥感监测中的应用

Application of Chinese-French Oceanography Satellite Scatterometer coastal product in typhoon remote sensing monitoring

中法海洋卫星(Chinese-French Oceanography Satellite,CFOSAT)搭载的微波散射计(CFOSAT Scatterometer,CSCAT)采用Ku波段扇形波束旋转扫描体制,具有观测几何信息丰富、观测样本数多的特点,是一种新型的海面风场遥感仪器。CSCAT的原始空间分辨率可达10 km×12.5 km,是目前空间分辨率最高的微波散射计,为开发高质量的近海岸高分辨率海面风场产品提供了可能性。首先,回顾了CSCAT近海岸风场遥感的原理,并利用辅助数据验证了这种新的科学产品的有效性。然后,利用CSCAT近海岸风场开展了台风灾害监测研究。与标准25 km分辨率的产品相比,CSCAT近海岸风场可以更细致地描绘台风结构,能够为气象和海洋防灾减灾提供更精准的信息支持与决策服务。

The scatterometer onboard Chinese-French Oceanography Satellite(CFOSAT)adopts the Ku-band fan-beam rotating scanning system,which has the characteristics of rich observation of geometry information and large number of observation samples.The CFOSAT Scatterometer(CSCAT)is a new type of remote sensing equipment for sea surface wind field.The original spatial resolution of CSCAT is 10 km×12.5 km,which is the highest spatial resolution of microwave scatterometer at present,and it provides the possibility of developing high-quality coastal high-resolution sea surface wind products.Firstly,the principle of CSCAT remote sensing of coastal wind field is reviewed,and the effectiveness of this new scientific product is verified by ancillary data.Then,the typhoon disaster monitoring research is carried out by using CSCAT coastal wind field.Compared with the standard product with a resolution of 25 km,CSCAT coastal wind field can describe typhoon structure in more detail and provide more accurate information support and decision-making service for meteorological and oceanic disaster prevention and mitigation.