中国空间科学技术（中英文）2025，Vol.45Issue(3)：100-109,10.DOI:10.16708/j.cnki.1000-758X.2025.0042
基于反射面天线的Geo-SAR卫星凝视模式姿控方法
Staring mode attitude control of Geo-SAR satellite with reflector antenna
摘要
Abstract
To improve the repeating cycle of Geo-SAR through prompt attitude control method,the staring mode attitude control property and system parameters'performance of Geo-SAR with reflector antenna are presented.The approach illuminated in this paper aims to shorten the attitude control time,and to improve the revisiting effect.Firstly,Geo-SAR staring mode model and Doppler history are illustrated and compared with those of low earth orbital SAR(Leo-SAR).Its maximum yaw angle to be compensated for broadside imaging is about±76° when traditional two-dimensional yaw steering(2D-YS)method is used.A new two-dimensional pitch and roll squint control(2D-PRSC)algorithm is advanced,which can make satellite continuously stare at any scene in the whole orbital period.The maximum attitude control angle is about±7.2°,and the capability of satellite is obviously improved.Finally,Geo-SAR fast BP imaging algorithm is illustrated in this paper.The point target with 25m×25m resolution is simulated,the imaging results are good and meet the theory parameters.The simulation results show that the new method in this paper is correct.As the reference scheme for attitude system design,the method can shorten the Geo-SAR attitude control time to about 1/10 of the original value.关键词
地球同步轨道SAR/反射面天线/二维俯仰滚动姿态控制/凝视模式/姿控时间Key words
Geo-SAR/reflector antenna/2D pitch and roll attitude control/staring mode/attitude control time分类
电子信息工程引用本文复制引用
赵秉吉,贺玮,张庆君,索志勇,遆晶晶..基于反射面天线的Geo-SAR卫星凝视模式姿控方法[J].中国空间科学技术（中英文）,2025,45(3):100-109,10.基金项目
国家自然科学基金青年基金(61601022) （61601022）
