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.
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)
关键词
合成孔径雷达
运动补偿
惯导
距离徙动校正
synthetic aperture radar （SAR）
motion compensation
IMU
range migration compensation
