REVERSE-RANGE-DOPPLER METHOD FOR AUTOMATED GEOCODING SAR IMAGES  

作　　者：Liu Jiayin Hong Wen 

机构地区：[1]Key Laboratory of Technology on Geo-spatial Information Processing and Application System,Chinese Academy of Sciences,Beijing 100190,China [2]National Key Laboratory of Microwave Imaging Technology,Beijing 100190,China [3]Institute of Electronics,Chinese Academy of Sciences,Beijing 1001q0,China

出　　处：《Journal of Electronics(China)》2012年第3期242-247,共6页电子科学学刊（英文版）

摘　　要：Range-Doppler (RD) method and Reverse-Range-Doppler (RRD) method are combined together to achieve automatic geocoding of Synthetic Aperture Radar (SAR) image quickly and accurately in the paper. The RD method is firstly used to locate the four corners of the image, then the other pixels of the image can be located by Reverse-Range-Doppler (RRD) method. Resampling is performed at last. The approach has an advantage over previous techniques in that it does not require ground control points and is independent of spacecraft attitude knowledge or control. It can compensate the shift due to the assumed Doppler frequency in SAR image preprocessing. RRD simplifies the process of RD, therefore speeds up the computation. The experimental results show that a SAR image can be automated geocoded in 30 s using the single CPU (3 GHz) with 1 G memory and an accuracy of 10 m is attainable with this method.Range-Doppler （RD） method and Reverse-Range-Doppler （RRD） method are combined together to achieve automatic geocoding of Synthetic Aperture Radar （SAR） image quickly and ac- curately in the paper. The RD method is firstly used to locate the four corners of the image, then the other pixels of the image can be located by Reverse-Range-Doppler （RRD） method. Resampling is performed at last. The approach has an advantage over previous techniques in that it does not require ground control points and is independent of spacecraft attitude knowledge or control. It can com- pensate the shift due to the assumed Doppler frequency in SAR image preprocessing. RRD simplifies the process of RD, therefore speeds up the computation. The experimentM results show that a SAR image can be automated geocoded in 30 s using the single CPU （3 GHz） with 1 G memory and an accuracy of 10 m is attainable with this method.

关 键 词：Range-Doppler (RD) Reverse-Range-Doppler (RRD) GEOLOCATION Automated geocoding Space-borne Synthetic Aperture Radar (SAR) 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]