基于最大似然估计的雷达高度计海面参数联合反演

Joint Inversion of Radar Altimeter Parameters Based on Maximum Likelihood Estimation

对合成孔径雷达高度计的参数反演问题进行了研究。根据合成孔径雷达高度计的海面回波模型,推导了利用最大似然估计反演海面参数的算法流程,并确定了联合反演时海面参数的估计顺序,然后在给定的仿真参数下对海面参数的反演流程进行了仿真。仿真得到的参数估计值满足指标要求,显示了算法的良好性能。分析结果对雷达高度计的系统设计和挂飞试验都有一定的参考意义。

In this paper, the parameter inversion of synthetic aperture radar（SAR） altimeter is investigated. Based on the sea echo model of SAR altimeter, algorithm flow of sea surface parameters inversion is derived using the maximum likelihood estimation strategy, and the estimation order is determine, then the parameter inversion process is simulated under certain simulation parameters. The estimated parameters meet the requirements of the index, and the superiority of the algorithm is shown. The analysis results will be of some reference value to the system design and hang up test of radar altimeter.