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2024-06-19
Improved Target Imaging Method for Arc Array Bistatic SAR with a Small Satellite Transmitter
By
Progress In Electromagnetics Research C, Vol. 144, 99-105, 2024
Abstract
Modern small satellite development represents a new trend, a new design idea, and it can be used as a transmitter to assist helicopter monitoring. The imaging model of the arc array bistatic SAR with a small satellite transmitter is studied. Due to the long resident time of small satellite platform and the wide-area observation capability of arc antenna, it has a wide application prospect in the field of earth detection and remote sensing. However, the motion state of the small satellite and the special scanning mode of the arc antenna have some effects on the SAR imaging results. Therefore, the imaging geometry of the arc array bistatic SAR with a small satellite transmitter is established, and an improved Chirp Scaling imaging algorithm is proposed. Firstly, the motion compensation function is used to compensate the migration caused by the high-speed motion of the small satellite. Then, the two-dimensional spectrum is derived by using standing phase principle and scaling function. Next, the coupling between range and azimuth is compensated by consistent range migration correction and secondary range compression, and residual phase is compensated in azimuth frequency domain. Finally, simulation results verify the effectiveness of the proposed method.
Citation
Peigeng Lu, Zhennan Qin, Wei Xu, Pingping Huang, Weixian Tan, and Yaolong Qi, "Improved Target Imaging Method for Arc Array Bistatic SAR with a Small Satellite Transmitter," Progress In Electromagnetics Research C, Vol. 144, 99-105, 2024.
doi:10.2528/PIERC24042202
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