分布式卫星ATI-SAR性能分析与基线估计
doi: 10.3724/SP.J.1146.2008.00782
Performance Analysis and Baseline Estimation for Distributed-Satellite ATI-SAR Systems
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摘要: 在应用分布式卫星沿航迹干涉SAR(ATI-SAR)进行对地运动目标检测(GMTI)时，基线测量精度对系统测速性能有着重要影响。针对此问题，该文分析了分布式卫星群的实际轨道情况，推导了考虑基线空间构型随时间不断变化时的基线测量误差与系统的地面运动目标测速误差间的关系，提出了一种可对基线进行高精度估计从而提高测速性能的方法。计算机仿真实验证实了文中所提出方法的有效性与准确性。Abstract: In the application of distributed-satellite Along-Track InterferometrySAR (ATI-SAR) for Ground Moving Target Indication (GMTI), measurement error of baseline will affect the systems GMTI performance. This paper analyzes the satellite clusters actual flying tracks, establishes the velocity-error model caused by baseline-measurement error considering the baselines time-variety, proposes a novel method to measure baseline accurately and obtain perfect performance of systems GMTI. Finally, the simulation experimental results prove the conclusion proposed.
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