GEO SAR波束误差综合补偿方法  

Comprehensive Compensation Method of Beam Error for GEO SAR

作　　者：倪崇 张庆君[1] 刘杰[1] 唐治华[1] 郑钢铁[2] NI Chong;ZHANG Qingjun;LIU Jie;TANG Zhihua;ZHENG Gangtie(Institute of Remote Sensing Satellite,China Academy of Space Technology,Beijing 100094,China;School of Aerospace Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国空间技术研究院遥感卫星总体部,北京100094 [2]清华大学航天航空学院,北京100084

出　　处：《航天器工程》2022年第2期49-54,共6页Spacecraft Engineering

基　　金：国家重点研发计划项目(2017YFB0502700)。

摘　　要：与低地球轨道合成孔径雷达(LEO SAR)相比,地球同步轨道合成孔径雷达(GEO SAR)具有合成孔径时间长、波足速度慢和幅宽大的特点。根据GEO SAR的特点,提出GEO SAR波束误差综合补偿方法,主要包括基于主被动联合振动抑制的高精度波束指向稳定度控制、基于卫星平台姿态摆动的波束方向图测量和基于分块处理的数据域波束误差补偿。该方法综合考虑了GEO SAR波束在各环节的误差源,可以最大限度地补偿波束误差,从而很好地改善GEO SAR的成像质量。Compared to LEO SAR(low earth orbit synthetic aperture radar),GEO SAR(geosynchronous synthetic aperture radar)has longer synthetic aperture time,slower beam foot speed and larger width.According to these characteristics of GEO SAR,a comprehensive compensation method of the beam error for GEO SAR is proposed mainly including high precision beam stability control method based on active and passive joint vibration suppression,beam pattern measurement method based on platform attitude swing and data domain beam error compensation method based on block processing.This method comprehensively considers various beam error sources of GEO SAR in the whole imaging process,which can get better compensation for beam errors and greatly improve the GEO SAR imaging quality.

关 键 词：地球同步轨道合成孔径雷达 波束误差 指向稳定度 方向图测量 数据域 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计]