星载SAR天线方向图在轨测量技术发展现状与趋势

摘要

合成孔径雷达(Synthetic Aperture Radar, SAR)天线方向图不确定性是影响SAR辐射精度的主要误差源,天线方向图在轨测量技术是星载 SAR 定标的关键技术之一。该文综述了星载 SAR 天线方向图在轨测量技术发展历程,分析了技术发展趋势,并对现有的在轨测量技术进行了分析比较,将为星载SAR天线方向图在轨测试方案的设计提供重要参考。%　　The antenna pattern uncertainty is the main error of Synthetic Aperture Radar (SAR) system. The technique for inflight antenna pattern measurement of spaceborne SAR is one of the most important technique of SAR calibration. This paper discusses the development courses of the inflight antenna pattern measurement of spaceborne SAR, analyses its development trend and compares the main inflight antenna pattern measurement techniques. This paper will be an important reference for designing a project of inflight antenna pattern measurement of spaceborne SAR.