| 锥摆扫一体化空间相机成像模式设计 |
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| 引用本文： | 支政,曲宏松,李静,张贵祥. 锥摆扫一体化空间相机成像模式设计[J]. 光学精密工程, 2021, 29(3): 536-546 |
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| 作者姓名： | 支政 曲宏松 李静 张贵祥 |
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| 作者单位： | 中国科学院长春光学精密机械与物理研究所,吉林长春130033;中国科学院大学,北京100049;中国科学院天基动态快速光学成像技术重点实验室,吉林长春130033;中国科学院长春光学精密机械与物理研究所,吉林长春130033;中国科学院天基动态快速光学成像技术重点实验室,吉林长春130033;北京跟踪与通信技术研究所,北京100094 |
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| 基金项目： | 国家自然科学基金资助项目(No.62075219,No.61805244);吉林省重点科技研发计划资助项目(No.20190303094SF)。 |
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| 摘 要： | 针对高分辨相机难以实现超宽覆盖的问题,本文设计了锥摆扫一体化成像模式.通过对锥摆扫一体化成像原理进行分析,建立了锥摆扫一体化成像模型;然后,设计了最佳地面轨迹模型,并分析了轨道速度、平台旋转角速度和摆扫转动角速度的关系,并基于地面轨迹给出了曝光时间、帧频的计算方案.最后,通过MATLAB进行算例仿真,并对地面覆盖宽度和...
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| 关 键 词： | 空间相机 成像模式 宽幅成像 几何参数 地面轨迹 |
Design of imaging model for cone-pendulum scanning integrated space camera |
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| ZHI Zheng,QU Hong-song,LI Jing,ZHANG Gui-xiang. Design of imaging model for cone-pendulum scanning integrated space camera[J]. Optics and Precision Engineering, 2021, 29(3): 536-546 |
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| Authors: | ZHI Zheng QU Hong-song LI Jing ZHANG Gui-xiang |
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| Affiliation: | (Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Space-based Dynamic&Rapid Optical Imaging Technology,Chinese Academy of Sciences,Changchun 130033,China;Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China) |
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| Abstract: | Achieving super-wide coverage for high-resolution cameras is difficult.To address this difficul?ty,this study designs a cone-pendulum scanning integrated imaging mode.First,by analyzing the princi?ple of cone-pendulum scanning integrated imaging,a cone-pendulum scanning integrated imaging model was established.Then,the optimal ground trajectory model was designed,and the relationship between the orbital velocity,angular velocity of the platform rotation,and angular velocity of the pendulum scan?ning rotation was analyzed.Simultaneously,based on the ground trajectory,a calculation scheme of expo?sure time and frame frequency was provided.Finally,MATLAB was used to perform simulations,and the ground coverage width and ground pixel resolution were analyzed.The results show that when the or?bital altitude is 500 km,pixel size is 2.5μm,focal length is 360 mm,and pixel number is 5120×5120,then the camera installation angle is 30°,number of frames of pendulum scanning imaging is 10,ground coverage width is 1105.7 km,which is 31.1 times that of the image sub-satellite point push scanning im?aging,and ground sample distance(GSD)is less than 6.4 m.The cone-pendulum integrated imaging mode can completely cover the ground target and considerably increase the width for specific resolutions. |
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| Keywords: | space camera imaging model wide field imaging geometric parameters ground track |
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