机载圆周SAR成像技术研究

机载圆周合成孔径雷达(CSAR)作为一种新兴的成像模式，具有全方位观测、高空间分辨率和可三维成像等优点。随着CSAR成像技术的不断发展，现已逐渐成为对重点区域实施精确观测的有效手段之一。该文重点阐述了作者所在研究团队近年来在机载CSAR成像技术方面完成的研究工作，包括机载CSAR成像模型，空间分辨率评估，CSAR二维成像，基于单圆周CSAR的目标三维图像重构和多基线CSAR(HoloSAR)三维成像等技术，并给出了P, X两个频段机载CSAR的实测数据处理结果。已取得的研究成果证明了机载CSAR成像的有效性和实用性。该文主要内容基于作者2019年8月16日在“雷达学报第五届青年科学家论坛”上的学术报告。 

Study of the Airborne Circular Synthetic Aperture Radar Imaging Technology

Circular Synthetic Aperture Radar(CSAR) is a novel imaging mode, which has the advantages of alldirectional observation, high spatial resolution, and three-dimensional imaging. With the development of airborne CSAR imaging techniques, it has become one of the effective methods for key point area observation.This paper introduces works on airborne CSAR imaging techniques performed by our research team in recent years, including airborne CSAR imaging mode, spatial resolution evaluation, two-dimensional CSAR imaging,three-dimensional target image reconstruction based on a single CSAR, and three-dimensional holographic SAR imaging. In this paper, experimental results based on raw data acquired using airborne CSAR systems with P and X bands are presented. The obtained research results prove the effectivity and practicability of the airborne CSAR imaging mode. The content of this paper is based on a keynote speech presented by the author at the Fifth Young Scientists Forum of Journal of Radars on August 15, 2019.