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合成孔径雷达具有全天时、全天候、作用距离远等特点,在遥感测绘和战场侦察等领域得到了广泛应用。但常规单基地SAR在载体运动方向正前方存在成像盲区,收发分置的双基地SAR可有效解决这一问题。简要阐述了双基地前视SAR的原理和优点,论述了双基地前视SAR技术的研究进展,从双基地构型出发,依据收发系统的空间关系将双基地前视SAR的类型进行了细致划分。指出了双基地前视SAR需解决的关键技术,即系统同步、空间配置和成像算法。最后探讨了双基地前视SAR在战场侦察和导弹制导中的应用模式。
Synthetic aperture radar with all-weather, all-weather, long range and other characteristics, in remote sensing and battlefield reconnaissance and other fields has been widely used. However, the conventional single-base SAR has imaging blind spots just in front of the carrier movement direction, and the bistatic SAR receiving and transmitting can effectively solve this problem. The principle and advantages of bistatic forward looking SAR are briefly introduced. The research progress of bistatic forward looking SAR is discussed. Based on the bistatic configuration, the types of bistatic forward looking SAR are classified according to the spatial relationship of the transmitting and receiving systems . The key technologies that need to be resolved in bi-base forward-looking SAR are pointed out, namely system synchronization, space configuration and imaging algorithms. Finally, the application mode of bistatic forward looking SAR in battlefield reconnaissance and missile guidance is discussed.