基于惯导的机载斜视SAR运动补偿研究  

Study on IMU based Motion Compensation for Airborne Squint SAR

作　　者：张雨轮 张涛[1] 李涛[1] 徐玮[1] 

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2014年第1期18-21,41,共5页Fire Control Radar Technology

基　　金：装备预先研究项目(40405020101)

摘　　要：本文建立了斜视SAR运动误差模型,采用了一种基于惯导的运动补偿方法。在正侧视角度分解的基础上,针对斜视的特点对分解方法进行了改进,在此基础上进行了速度矢量投影并完成包络校正和相位误差补偿。该方法计算量小,避免了分段估计斜视角从而引入的图像拼接问题。实测数据结果表明其适应性强,在较大斜视角情况下能够得到质量较高的SAR图像。Motion error model for squint synthetic aperture radar （SAR） is presented based on inertial measurement unit （IMU）. According to right side - looking angle decomposition, an improvement angle decomposition method is proposed based on characteristics of squint SAR; then velocity vector projection as well as envelope correction and phase error compensation are completed. This method features low computation load; and image mosaic due to squint segmentation evaluation can be avoided. Experiment data show that this method has high adaptability; high quality SAR image in large squint mode can be obtained.

关 键 词：合成孔径雷达 运动补偿 惯导 距离徙动校正 

分 类 号：TN958[电子电信—信号与信息处理]