分布式小卫星SAR顺轨基线解耦合分析
doi: 10.3724/SP.J.1146.2006.00706
Analysis of the Along-track Baseline Decorrelation of Distributed Small Satellites SAR
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摘要: 地面动目标检测是分布式小卫星SAR研究的热点之一，但是分布式小卫星的空间构形导致混合基线的存在，使得地形变化和地面目标运动引起的相位难以区分以致从地面杂波中发现动目标非常困难。该文利用矢量法分析了基线耦合产生的原因，研究了一种能够实现顺轨基线解耦合的轨道构形，计算和仿真表明该文的方法能够有效地把影响动目标检测的垂直航迹基线引起的相位去除。Abstract: Ground Moving Target Indication (GMTI) is one of hotspot of Distributed Small Satellites SAR (DSS-SAR) research, but its very difficult to detect ground moving target from background clutter because of the existence of baseline correlation which result in difficulty to separate the phase produced by terrain height and ground moving target. This paper analyzes the reason of baseline correlation and proposes a promising method to eliminate the interferometric phase induced by cross-track baseline. The computer simulations show that it is efficient to eliminate cross-track baseline interferometric phase.
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