中国工程科学Issue(6)：27-32,6.
海洋二号卫星3个主要载荷风速测量比较
Comparison of wind speed from 3 main payloads of HY-2 satellite
摘要
Abstract
Sea surface wind speed plays a very important role in the transfer of kinetic energy in the ocean and the exchange of the matter and energy in the air-sea surface. There are three payloads on HY-2 satellite which can be used to detect the sea surface wind speed. The payloads are radar altimeter,microwave scatterometer and scanning microwave radiometer. The diffe-rence is that the radar altimeter can measure the wind speed at the nadir point of the HY-2 satel-lite,the microwave scatterometer can detect the wide swath wind field,and the scanning micro-wave radiometer can measure the wide swath wind speed only. In order to analyze the capacity of the three payloads,in this study,the Typhoon Usagi was selected for comparing the ability of the three payloads to measure the wind speed. It turned out that when the wind speed is lower than 20 m/s,the wind speed from radar altimeter is much the same as that from microwave scat-terometer. The standard deviation is less than 2 m/s. But when wind speed is between 20 m/s and 35 m/s,the wind speed of radar altimeter is close to the scanning microwave radiometer. Only the scanning microwave radiometer is able to detect the wind speed higher than 35 m/s. Before using it to measure the wind speed higher than 35 m/s,we have to assess the accuracy of measurement.关键词
风速/雷达高度计/海洋二号Key words
wind speed/radar altimeter/HY-2分类
海洋科学引用本文复制引用
贾永君,刘建强,林明森,张有广..海洋二号卫星3个主要载荷风速测量比较[J].中国工程科学,2014,(6):27-32,6.基金项目
海洋公益性行业科研专项经费项目（201105032）；国家高技术研究发展计划（863计划）“海洋动力环境微波遥感信息提取技术与应用” （）
