一种消除合成孔径雷达高度计延迟校正中残余误差的新算法及仿真验证  

A New Range Migration Correction Algorithm and Its Simulation for SAR Altimeter

作　　者：王磊[1,2,3] 许可[1,3] 史灵卫[1,3] 杨双宝[1,3] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院微波遥感技术重点实验室,北京100190

出　　处：《电子与信息学报》2015年第11期2713-2718,共6页Journal of Electronics & Information Technology

摘　　要：合成孔径雷达高度计可以获得比传统雷达高度计更高的测量精度,延迟校正是其中的核心技术。在雷达收发脉冲的间隔内,由于卫星运动,目标与雷达之间的距离变化会带来残余误差,这点在现有的延迟校正算法中都未考虑。该文研究了垂直速度和水平速度对延迟校正的影响,建立了合成孔径雷达高度计的延迟校正模型,提出了一个新的延迟校正算法,消除了卫星垂直速度和水平速度带来的残余误差。最后通过计算机仿真进行了验证,仿真结果表明,该文提出的算法可得到准确的校正结果。The Range Migration Correction （RMC） is a key technique of synthetic aperture radar altimeter which is more precise than the conventional radar altimeter. Because of the satellite motion, the distance change between the satellite and the observed target will bring about some residual errors, but they are ignored in the existing RMC algorithms. In this paper, the influences of the vertical and horizontal velocities of the satellite are studied, then an RMC model is builded, and finally a new RMC algorithm which corrects not only the slant range error but also the residual errors is proposed. The simulation results show that this new algorithm can obtain more accurate outcomes.

关 键 词：合成孔径雷达高度计 延迟校正算法 残余误差 

分 类 号：TN953[电子电信—信号与信息处理]