超宽幅遥感转扫成像分析  

Ultra-wide remotely-sensed rotate-broom scanning imaging analysis

作　　者：谢虹波 费强 谢新旺 孙景旭 XIE Hong-bo;FEI Qiang;XIE Xin-wang;SUN Jing-xu(Ji Hua Laboratory,Foshan 528200,China)

机构地区：[1]季华实验室,广东佛山528200

出　　处：《液晶与显示》2022年第9期1209-1215,共7页Chinese Journal of Liquid Crystals and Displays

基　　金：广东省科技计划(No.X190121TC190)。

摘　　要：空间遥感成像正朝着小型化、大幅宽和高分辨率的方向发展。区别于常用的沿轨推扫成像方法,本文提出采用反射镜转扫成像的新方法,实现了垂轨千公里级成像。结合卫星运动模型,本文分析了该系统中转扫行频、分辨率以及成像幅宽等计算方法。基于实际的设计参数,文中仿真分析了卫星轨道变化对成像系统的影响。轨道越高,分辨率越低,成像幅宽越大,渡越时间越大,行频越低,对后端读出系统设计要求越低。相反,轨道越低,分辨率越高,成像幅宽越小,渡越时间越小,行频越高,对后端读出系统设计要求越高。Space remote sensing image is developing towards miniaturization,large width and high resolution.Different from the conventional method of push-broom scanning alone the orbit,this paper puts forward a new rotate-broom scanning method using the reflector,which can obtain thousand-kilometers-level width.In this system,combining with the satellite motion model,we analyze the calculation methods of scanning line frequency,resolution and image width.Based on the design parameters,we simulate and analyze the influence on the imaging system when the height of satellite orbit changes.When the height of orbit becomes higher,the resolution is lower,the image width is larger,the transit time is larger,the line frequency is lower,and the design requirement for the back-end readout system is lower.On the contrary,when the height of orbit becomes lower,the resolution is higher,the image width is smaller,the transit time is larger,the line frequency is lower,and the design requirement for the back-end readout system is lower.

关 键 词：转扫成像 行频匹配 大幅宽 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]