分布式小卫星联合多普勒解模糊 SAR 成像

摘要

A joint SAR imaging algorithm with Doppler ambiguity removal is proposed,which can be used for high resolution wide swath SAR imaging in low pulse repetition frequency(PRF)for distributed micro-satel-lite constellation.The algorithm is capable of correcting the vertical baseline effectively,not only for the range-invariant component and range-variant component,but also for the phase related to residual baseline in vertical combined with Doppler ambiguity removal.Consequently,the Doppler ambiguity can be removed as completely as possible.Moreover,the algorithm precision is also analyzed to support its potential in real application.Final-ly,simulated data experiment is designed to validate the proposal.%针对分布式小卫星体制提出联合多普勒解模糊 SAR 成像算法，实现低方位重频采样下的高分辨宽测绘带 SAR 成像。该算法可以有效校正垂直基线，进而解决其对多普勒解模糊性能的影响。不但校正了垂直基线对应的非空变部分和空变部分，而且结合多普勒解模糊算法校正了残余的垂直基线相位项，从而可以保证多普勒解模糊算法精确实现。另外，针对算法精度进行详细分析，增强文章的工程应用价值。最后，利用仿真实验数据验证算法的有效性。