星载SAR技术的现状与发展趋势

纵观星载合成孔径雷达技术的发展历程，其发展趋势已经从传统的单项技术突破转变为概念体制的更新。各种面向新型应用的新体制、新模式不断出现，推动着星载 SAR 技术蓬勃发展。该文在介绍欧美等国星载 SAR 技术发展现状的基础上，分析未来星载SAR 技术的发展趋势，重点探讨星载 SAR 技术在面向高分辨率宽覆盖对地观测、多方位角信息获取、高时相信息获取、3维地形测绘及图像质量提升等方面的发展。

Current Situation and Development Trends of Spaceborne SAR Technology

Throughout the progress of spaceborne Synthetic Aperture Radar (SAR) technology, it is switching from traditional specific technology breakthrough to concept and system innovation. Nowadays various application- oriented new systems and new models are emerging, which push forward the development of spaceborne SAR technology. This paper provides an introduction on the status of spaceborne SAR technology in Europe, the United States and other countries and discusses the trends of future spaceborne SAR technology. Emphases are laid on the development of spaceborne SAR technology for high-resolution wide-swath observation, multi-azimuth information acquisition, high-temporal information acquisition, 3-D terrain mapping and image quality improvement.