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合成孔径雷达(ＳＡＲ)是雷达理论和技术发展到一定阶段的基础上诞生的一种具有很高分辨率的成像雷达。它在众多领域得到了广泛的应用。在飞行器组合导航系统中,利用ＳＡＲ图像进行图像匹配,可以极大地提高系统的导航精度。本文介绍了ＳＡＲ、组合导航系统的发展及研究现状。重点介绍了ＳＡＲ在飞行器组合导航系统中的应用,并给出了具有较高精度、容错性和自主性的ＩＮＳ/ＧＮＳＳ/ＳＡＲ组合导航系统的原理、结构及仿真结果。
Synthetic Aperture Radar (SAR) is a kind of imaging radar with high resolution which is born on the basis of the development of radar theory and technology. It has been widely used in many fields. In aircraft integrated navigation system, the use of SAR images for image matching, can greatly improve the navigation accuracy of the system. This article introduces the development and research status of SAR, integrated navigation system. The application of SAR in the integrated navigation system of aircraft is introduced emphatically. The principle, structure and simulation results of INS / GNSS / SAR integrated navigation system with high precision, fault tolerance and autonomy are given.