摘要
提出一种工作在65~70 GHz强氧气吸收波段的星载差分吸收气压雷达,用以连续获取全球高时空分辨率的海面气压数据。通过对星载差分吸收气压雷达系统设计需求的分析,利用大气廓线数据和大气吸收系数模型,对海面气压差分吸收的性能进行了仿真及性能分析。仿真结果表明:通过强氧气吸收波段下的海面气压和差分吸收指数之间存在线性关系,星载差分吸收气压雷达在66 GHz与69 GHz的工作频率下晴空时得到的海面气压估计的均方根误差在2.6 mbar,不同云况下得到的海面气压估计的均方根误差在3~4 mbar,为后续雷达系统的设计与工程实现提供了参考与依据。
A spaceborne differential absorption barometric pressure radar operating in the 65~70 GHz strong oxygen absorption band is proposed to continuously acquire sea surface pressure data with global high temporal and spatial resolution. Through the analysis of the design requirements of the spaceborne differential absorption barometric radar system,the atmospheric profile data and the atmospheric absorption coefficient model are used to simulate and analyze the performance of the sea surface pressure differential absorption. The simulation results show that there is a linear relationship between the sea surface pressure in the strong oxygen absorption band and the differential absorption index. The RMSE of the sea surface pressure estimation obtained by the spaceborne differential absorption barometric pressure radar under clear sky at operating frequencies of 66 GHz and 69 GHz. The error is 2.6 mbar,and the rms error of the sea surface pressure estimation obtained under different cloud conditions is 3 to 4 mbar,which provides a reference and basis for the design and engineering implementation of the subsequent radar system.
作者
胥鑫
朱迪
Xu Xin;Zhu Di(National Space Science Center,Chinese Academy of Sciences,Beijing 101400,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《遥感技术与应用》
CSCD
北大核心
2021年第3期594-604,共11页
Remote Sensing Technology and Application
基金
微小卫星大气微波探测有效载荷及应用技术(D040301)。
关键词
差分吸收气压雷达
海面气压测量
雷达系统仿真
主动遥感
Differential absorption technology
Sea surface pressure measurement
Radar system simulation
Active remote sensing
