In this paper,the imaging characteristics of the ship-moving target in the medium earth orbit SAR single-channel mode is analyzed.Compared with low-earth-orbit SAR,the PRF of the medium earth orbit SAR system is lower,which implies the imaging of ship-moving targets is easy to be blurred,with the focusing position of blurred images being far apart.In the moving target posi-tioning processing,to obtain the complete azimuth envelope of the moving target to achieve accurate estimation of the positioning parameters,it is necessary to directly intercept the slice image containing all the blurred images,which will increase the amount of azimuth processing data and is a huge challenge for real-time processing.Therefore,based on the detected single blurred target slice image,this paper proposes a processing method to complete the precise positioning of the moving target.Simulation experi-ments show that the proposed processing method can effectively reduce the amount of processing data and achieve precise positio-ning of the moving target.
关键词
中轨SAR/动目标特性/单通道SAR/动目标定位
Key words
medium earth orbit SAR/moving target characteristic/single-channel SAR/moving target positioning
维普
万方数据