摘要
自1960年4月诞生国际上第一部合成孔径雷达(SAR)以来,SAR技术及应用发展已进入一个新的阶段.在该阶段,对电磁波的波段、极化、振幅和相位等信息的利用更加深入和综合,其显著的技术特征为双/多站或星座观测、极化干涉测量、高时序高分宽幅测绘、三维/四维结构信息获取和超高分辨率观测,其显著的应用特征为面向全球性重大问题如全球变化和全球可持续发展实现地球表面动态过程高精细、大尺度和时间连续的监测和评估.本文首先介绍了SAR对地观测技术的研究背景及意义,然后就四种典型的先进SAR即极化SAR、极化干涉SAR、层析SAR和超高分辨率SAR论述了其近十年来的研究进展,最后,展望了未来这些先进SAR对地观测技术的发展趋势,并重点探讨了在多通道信息获取、多角度观测、高时相观测、分辨率和测绘幅宽提升等方面的发展趋势.
The Synthetic Aperture Radar(SAR) technology and its application have developed rapidly since the birth of the first SAR in April of 1960.The deepening and comprehensive technological utilization of different electromagnetic wavebands,polarization,amplitude and phase information,is characterized by the bi-static/multi-static or constellation observation,polarimetric SAR interferometric measurement,high revisit and wide swath mapping with high resolution,3 D/4 D structure information retrieval,and ultra-high resolution observation.In application aspects,it is featured by efforts to realize the high precision,large scale and time continuous monitoring and evaluation of the Earth surface dynamic process,under the background of major global issues such as global change and global sustainable development.In this paper,we introduce the research background and significance of the new SAR technology for earth observation,and then analyze the progresses of four typical advanced SAR technologies for the past decade,including polarimetric SAR(PolSAR),polarimetric interferometric SAR(PolInSAR),tomographic SAR(TomoSAR),and ultra-high resolution SAR(UHR SAR).Finally,the future development trend of the SAR earth observation technology is analyzed,mainly focused on four aspects:multi-channel information acquisition,multi-angle observation,high temporal observation,high resolution and wide swath mapping.
作者
李新武
郭华东
彭星
张露
傅文学
梁雷
吴文瑾
LI Xinwu;GUO Huadong;PENG Xing;ZHANG Lu;FU Wenxue;LIANG Lei;WU Wenjin(Key Lab of Digital Earth Sciences,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094;School of Geography and Information Engineering,China University of Geosciences(Wuhan),Wuhan 430074)
出处
《南京信息工程大学学报（自然科学版）》
CAS
2020年第2期170-180,共11页
Journal of Nanjing University of Information Science & Technology（Natural Science Edition）
基金
国家自然科学基金(41571360)。
