机载SAR运动补偿残余误差建模及影响分析

doi:10.13474/j.cnki.11-2246.2015.0008

测绘通报 ›› 2015, Vol. 0 ›› Issue (1): 44-49,62.doi: 10.13474/j.cnki.11-2246.2015.0008

• 高分辨率对地观测技术 • 上一篇下一篇

机载SAR运动补偿残余误差建模及影响分析

毛永飞, 高文军, 韩运忠

北京空间飞行器总体设计部, 北京 100094

收稿日期:2014-07-30 出版日期:2015-01-25 发布日期:2015-01-24
作者简介:毛永飞(1983-),男,博士,工程师,主要从事合成孔径雷达、雷达系统设计、相控阵天线方面的研究.E-mail:myfchn@163.com
基金资助:
国家自然科学基金(61302165)

Analysis of Residual Errors in SAR Motion Compensation

MAO Yongfei, GAO Wenjun, HAN Yunzhong

Received:2014-07-30 Online:2015-01-25 Published:2015-01-24

摘要/Abstract

摘要：

在基于运动传感器测量数据的机载SAR运动补偿方法中,IMU/GPS测量误差和地物定位误差等非理想因素的存在会导致相位补偿量的不准确,进而引入残余运动误差,影响SAR图像质量.本文针对IMU的各项测量误差、系统延时误差、多普勒中心频率误差、参考DEM误差等影响轨迹测量和地物定位精度的具体因素展开研究,建立了上述因素与残余运动误差之间的函数关系.该函数关系显示,残余运动误差主要来源于航迹测量误差和地物定位误差,航迹测量误差主要根源于IMU/GPS测量单元中加速度计的常值漂移和IMU关于姿态角的测量误差,地物定位误差主要根源于参考DEM误差等因素.本文通过建模分析,完成了对机载SAR运动补偿精度退化机理的研究.

关键词: 合成孔径雷达, 运动补偿, 残余误差, IMU

中图分类号:

P237

毛永飞高文军韩运忠. 机载SAR运动补偿残余误差建模及影响分析[J]. 测绘通报, 2015, 0(1): 44-49,62.

MAO Yongfei, GAO Wenjun, HAN Yunzhong. Analysis of Residual Errors in SAR Motion Compensation[J]. 测绘通报, 2015, 0(1): 44-49,62.

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机载SAR运动补偿残余误差建模及影响分析

Analysis of Residual Errors in SAR Motion Compensation

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