红外技术2016，Vol.38Issue(9)：733-738,6.
空间超大视场相机速度失配对成像质量的影响
The Influence on Image Quality by Speed Mismatch of Space Camera With Huge FOV
摘要
Abstract
Space charge-coupled device time delay integration(TDI-CCD) camera with huge FOV can improve the observation swath and the camera sensitivity effectively. But during the imaging process of space camera with huge field of view, because of the curvature of the earth, the edge field resolution of camera reduced. It is derived that formula for calculating speed mismatch ratio and Modulation Transfer Function(MTF) of space camera with huge field of view in a different field position. The influence on TDI-CCD detector imaging quality by adjusting row transfer periods uniformly and separately in a camera with a space huge field of view is analyzed. The results of experiments and analysis suggest when the falling of MTF no more than 10% in spatial Nyquist frequency, the integration time is 4, adjusting row transfer periods uniformly can be used with the huge field no more than 55 for image motion compensation, when the total huge field reach 120, the field of view pixels witch meet the requirements increase from 47.8% to 86.5% when adjusting row transfer periods separately.关键词
空间遥感/速度失配/超大视场相机/调制传递函数/TDI-CCDKey words
spatial remote sensing/speed mismatch/huge FOV camera/MTF/TDI-CCD分类
航空航天引用本文复制引用
董龙平,徐菲菲,黄小仙,尹达一..空间超大视场相机速度失配对成像质量的影响[J].红外技术,2016,38(9):733-738,6.基金项目
国家自然科学基金（40776100）。 （）
