项目名称: 星载多普勒雷达散射计海流反演技术研究
项目编号: No.41606202
项目类型: 青年科学基金项目
立项/批准年度: 2017
项目学科: 天文学、地球科学
项目作者: 鲍青柳
作者单位: 国家卫星海洋应用中心
项目金额: 14万元
中文摘要: 洋流是海洋中水体有规律的运动,它是影响和调节全球气候变化的重要参数之一,洋流对海洋中多种物理过程、化学过程、生物过程和地质过程,以及气候和天气的形成及变化,都有影响和制约的作用。多普勒雷达散射计是一种新型的海洋遥感雷达系统,通过对海面雷达回波信号多普勒频率的检测实现海面流场(流速和流向)的观测,通过对海面后向散射系数的高精度测量,可以实现海面风场(风速和风向)的反演。多普勒雷达散射计的海洋表面流测量精度主要受到反演误差的制约,研究和开发适合于多普勒雷达散射计的海洋表面流反演方法成为多普勒雷达散射计发展的必要条件。本项目主要内容包括星载多普勒雷达散射计的测量性能分析和海洋表面流的反演算法研究两部分。这两部分内容构成一套完整的星载多普勒雷达散射计海洋表面流测量精度评估体系。
中文关键词: 微波遥感;微波散射计;后向散射系数
英文摘要: Ocean current is the regular movement of seawater. It is one of the important parameters that adjusts the global climate changes. Ocean current also influences many physical, chemical, biological, and geological process of ocean, and affects the formation and variation of climate and weather. Ocean current Doppler Scatterometer is a new type of radar for ocean remote sensing. The ocean surface current field (speed and direction) can be retrieved from the Doppler frequency shift of radar echoes. And the ocean surface wind field (speed and direction) can be retrieved from the high-accuracy measurement of backscattering coefficient. The measurement accuracy of ocean surface current is restricted by its inversion error. The research of suitable ocean surface current inversion method is essential for the development of Doppler Scatterometer. This project contains two parts: the performance analysis of Doppler Scatterometer and inversion algorithm research of ocean surface current. These two parts constitute a complete evaluation system of spaceboren Doppler Scatterometer for sea surface ocean current measurement.
英文关键词: microwave remote sensing;microwave scatterometer;backscattering coefficient