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Synthetic Aperture Radar (SAR) is one of the active microwave imaging sensors, which can be work all-day and all weather. However, the current SAR system cannot provide the continuous surveillance, limiting the application of SAR images, especially in the case of complex terrain. In this paper, the new imaging modes are proposed based on video SAR, which is suitable for regional situation awareness in complex terrain. Then, the performance of Video SAR system is analysed combined with the imaging mode. Moreover, a parallel imaging method based on DCS algorithm is presented for video SAR data fast focusing. Finally, experimental results are provided to demonstrate the effectiveness of the proposed method.

Regional Situation Awareness in Complex Terrain Using Spaceborne Video SAR