分布式卫星SAR沿航迹干涉编队构型优化

Formation Optimization for Distributed Satellites SAR Along-Track Interferometry

沿航迹干涉(ATI)SAR可用来测量地面运动目标的径向速度,分布式卫星系统能改善ATI测速精度并增加系统可检测速度范围。合理地设计小卫星间的空间编队构型是保证分布式卫星系统性能的关键。该文给出一种综合评价分布式卫星SAR系统测速精度的模型,该模型可用来对满足绕飞轨道的分布式卫星群的构型进行优化设计。采用随机搜索算法进行了仿真试验,试验结果验证了本文方法的有效性。

Along-Track Interferometric （ATI） SAR can be used to measure the radial velocity of ground moving targets. By using distributed satellites system the metrical accuracy will be improved and the measurable radial range will be increased. The key point of guaranteeing the distributed satellites system performance is to design the formation of the satellites appropriately. A velocity metrical accuracy model is developed to estimate distributed satellites SAR system performance. This model can be used to optimize the satellite formation of distributed satellites system which moves on flying around orbit. Finally, it is validated by simulation using randomized search algorithm, and the simulation results demonstrate the efficiency of the method.