摘要
为了提高综合孔径辐射成像系统在地球物理摄动因素影响下的图像精度,对低轨星载综合孔径辐射成像系统的成像误差的修正方法进行了研究,提出了针对地球形状摄动、大气阻力摄动以及两种摄动共同作用的空域补偿动力学模型,结合空域摄动法和数值分析方法对这一空域误差补偿动力学模型进行了模型简化以及误差补偿算法的研究,并给出了空域补偿算法的流程图。仿真结果表明,所提出的空域补偿算法极大地提高了综合孔径辐射成像系统对于目标场景物体的恢复精度,有效降低了综合孔径辐射成像系统成像的摄动力误差。
In order to improve the accuracy of the synthetic aperture imaging system under the influence of geophysical perturbation factors,this paper researches the imaging error correction method for synthetic aperture radiometric imaging system on low orbit satellite.The spatial compensation models are proposed for Earth shape perturbation,atmospheric drag perturbation and the combination of two perturbations.The spatial perturbation models and the compensation algorithm are simplified by combination of spatial turbulence error models with numerical analysis,and the flowchart of the airspace compensation algorithm is given.The simulation results show that the proposed spatial compensation algorithm greatly improves the accuracy of the synthetic aperture imaging system for the target scene,and effectively reduces the perturbation error of the synthetic aperture radiation imaging system.
作者
钱满义
王世英
申艳
祝聪
QIAN Manyi;WANG Shiying;SHEN Yan;ZHU Cong(School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《电讯技术》
北大核心
2020年第10期1200-1208,共9页
Telecommunication Engineering
基金
“十三五”预研领域基金(61400010302)。
关键词
编队卫星
综合孔径辐射计
数值积分
轨道摄动
误差补偿
satellite formation
synthetic aperture radiometer
numerical integration
track perturbation
error compensation
