【摘要】 分析了机载SAR(Synthetic Aperture Radar)条带成像模式的运动补偿技术原理,通过对激光IMU/GPS(Inertial Measurement Units/Global Positioning System)组合提供的位置参数进行分析,表明Y12载机平台具有很大的运动误差,在此基础上利用高精度激光IMU/GPS组合提供的天线相位中心精确位置参数,结合距离-多普勒成像算法进行了机载SAR数据的运动补偿处理,试验表明利用此IMU/GPS提供的运动参数进行对具有很大运动误差的SAR数据运动补偿后,已不需要计算负担沉重的自聚焦类算法进行残留运动误差补偿,就能得到高质量的高分辨率SAR图像.更多还原

【Abstract】 The motion compensation technique for airborne stripmap mode SAR(synthetic aperture radar) was briefly analyzed,the strong motion errors with small aircraft Y12 were evident through analyzing the position parameters offered by an IMU/GPS(inertial measurement units/global positioning system) unit with laser gyros,then the motion compensation processing,which combined with range-Doppler image formation algorithm,was tested based on the high precision APC(antenna phase center) position parameters provided by the laser IMU/GPS unit.The results showed that high quality SAR images could be obtained directly from SAR raw data with serious motion errors through motion compensation procedure,so any kind of autofocus procedures with heavy computation load does not needed to correct the residual motion errors.更多还原