摘要
为解决传统干涉合成孔径雷达(SAR)系统只能顺轨干涉或交轨干涉,无法兼顾高精度高程测量和速度测量的问题,开展了Ka波段机载双模式干涉SAR系统设计与干涉测量精度分析。基于Ka波段电磁波波长短、干涉相位敏感度好的特点,利用较短的干涉基线在同一干涉SAR系统中实现高精度干涉测高与测速,并介绍了所设计的Ka波段机载双模式干涉SAR验证系统。仿真结果表明:该系统具备高效率、高精度干涉测量能力,可获得亚米级的绝对测高精度和0.1 m/s的测速精度。
To solve the problem that the conventional interferometric synthetic aperture radar(InSAR)can only realize along-track interferometry(ATI)or cross-track interferometry(XTI),Ka-band dual-mode InSAR system design is carried out and analysis on interferometric measurement accuracy is made.Compared with low-band electromagnetic wave such as L-band or C-band,Ka-band electromagnetic wave has shorter wavelength.Therefore,high interferometric accuracy can be obtained by use of shorter interferometric baseline,and the realization of both ATI and XTI with the same system is proposed.In this paper,Ka-band airborne dual-mode digital beam forming(DBF)interferometric SAR system design is introduced and its interferometic accuracy is analyzed based on system parameters.The simulation results validate the performance of the system.The height measurement accuracy is better than 1 m and the velocity measurement accuracy is better than 0.1 m/s.
作者
郑世超
王辉
孙志强
孔令振
ZHENG Shichao;WANG Hui;SUN Zhiqiang;KONG Lingzhen(Key Laboratory of Millimeter Wave Romote Sensing Technology,Shanghai Academy of Spaceflight Technology,Beijing 100086,China;Key Laboratory of Millimeter Wave Romote Sensing Technology,Shanghai Academy of Spaceflight Technology,Shanghai 201109,China)
出处
《上海航天》
CSCD
2018年第6期1-7,共7页
Aerospace Shanghai
关键词
合成孔径雷达(SAR)
KA波段
顺轨干涉
交轨干涉
synthetic aperture radar(SAR)
Ka-band
along-track interferometry
cross-track interferometry
作者简介
郑世超(1986—),男,博士,主要研究方向为SAR系统设计与信号处理。
