光学精密工程2012，Vol.20Issue(12)：2812-2820,9.DOI:10.3788/OPE.20122012.2812
姿态对地指向不断变化成像时的像移速度计算
Calculation of image motion velocity for agile satellite dynamic imaging to changed continuously attitude point
摘要
Abstract
According to the principle of push-broom imaging of a linear array Time Delay Integration (TDI) CCD, the image motion in dynamic imaging of a agile satellite is analyzed in three-axis attitude maneuvering. As the changed continuously attitude points to the earth can change the spatial orientation and result in a changed image motion velocity, the image quality and image resolution will be deteriorated. To decrease the influence of attitude change on image quality, this article uses the coordinate transformation to acquire the mathematical expression of the image motion velocity in dynamic imaging, and obtains the variety of the image motion velocity in simulation analysis to quantify the magnitude of the integration time. Numerical simulation shows that the current level of space camera can achieve the max angular velocity limit dynamic push-broom imaging of 0, 5(°)/s on an orbit height of 700 km. When the attitude maneuvering angular velocity is greater than 0. 5(°)/s ,it needs to design a high level camera because the exposure time is shorter and shorter. Based on the above conclusion, it suggests that the magnitude of integration time for TDI CCD TDI) should be quantified for dynamic imaging at different angle speeds, and only in this way can the push-broom dynamic imaging be implemented in three-axis attitude maneuvering.关键词
敏捷成像/TDI-CCD相机/像移/积分时间/像移速度/动态成像Key words
agile imaging/Time Delay Integration(TDI)-CCD camera/image motion/integration time/ image motion velocity/ dynamic imaging分类
航空航天引用本文复制引用
黄群东,杨芳,赵键..姿态对地指向不断变化成像时的像移速度计算[J].光学精密工程,2012,20(12):2812-2820,9.基金项目
航天东方红卫星有限公司自主研发课题资助项目(No.025YF-Z-01) （No.025YF-Z-01）
