College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Sensors (Basel). 2022 Aug 30;22(17):6534. doi: 10.3390/s22176534.
Based on the analysis of the airborne bistatic synthetic aperture radar (SAR) imaging geometric mode, an extended nonlinear chirp scaling algorithm is employed to simulate and verify the imaging effect of the bistatic SARs. A gradient theory-based two-dimensional resolution bistatic SAR model is proposed, and the constraints of the multi-platform flight trajectory parameters meeting the imaging accuracy of the bistatic SAR are analyzed. Finally, through the bistatic SAR imaging simulation of cooperative flight trajectories under various situations, the spatial configuration constraint envelope between the flight vehicles to achieve the optimal resolution is revealed. The results of this paper will provide a theoretical reference for the SAR application in formation flight control.
基于对空基双基合成孔径雷达（SAR）成像几何模式的分析，采用扩展的非线性线性调频斜率算法对双基 SAR 的成像效果进行模拟验证。提出了基于梯度理论的二维分辨率双基 SAR 模型，并分析了满足双基 SAR 成像精度的多平台飞行轨迹参数的约束条件。最后，通过对各种情况下协同飞行轨迹的双基 SAR 成像仿真，揭示了实现最优分辨率的飞行器之间的空间配置约束包络。本文的研究结果将为 SAR 在编队飞行控制中的应用提供理论参考。
