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星载Mosaic模式SAR成像算法研究 被引量:1

Research on Imaging Algorithm for Spaceborne Mosaic Mode Synthetic Aperture Radars
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摘要 以色列发射的第1颗SAR(合成孔径雷达)侦察卫星TECSAR中成功应用了一种新的工作模式———Mosa-ic模式,该模式兼具高分辨率和大成像测绘带的优势。给出了该模式可行的成像方案,并提出了一种解多普勒模糊的方位变调频算法,结合ECS(扩展线频调变标)算法对该模式进行成像,降低了系统对PRF(脉冲重复频率)的要求,在系统所能达到的有限PRF条件下,最大程度地增加了马赛克单元的方位无模糊成像宽度。仿真结果验证了算法的有效性。 Mosaic mode has the advantages of high resolution and large swath and it is used successfully in the first SAR (Synthetic Aperture Radar) reconnaissance satellite TECSAR o{ Israel. This paper presents a feasible imaging method and a novel azimuth chirp varied algorithm to resolve Doppler ambiguity. The traditional ECS (Extended Chirp Scaling) algorithm is employed and the improved ECSA is used for spaceborne mosaic mode SAR imaging, featuring decrease of system requirements on PRF (Pulse Repetition Frequency). Within the limit of PRF of the system, azimuth imaging area size with no ambiguity is enlarged to the maximal extent by this algorithm. Simulation results demonstrate the validity of the method.
出处 《飞行器测控学报》 CSCD 2013年第2期182-187,共6页 Journal of Spacecraft TT&C Technology
关键词 星载合成孔径雷达 马赛克模式 多普勒模糊 扩展线频调变标算法 Spaceborne Synthetic Aperture Radar (SAR) Mosaic mode Doppler ambiguity Extended Chirp Scaling (ECS) algorithm
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参考文献8

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共引文献5

同被引文献13

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