摘要
为了减小偏流角对空间相机图像质量的影响,延长相机一次性有效连续摄像时间,提出了一种在相机摄像前的准备阶段,偏流角的周期性连续调整方法。首先,详细分析偏流角调整的需求,确定调整策略;然后,介绍了偏流角调整系统的构成及工作原理;最后,系统设计和实验验证。实验结果表明:单次调整误差≤40″,调整周期为512ms,摄像开始时偏流角≤56″,对图像MTF值的影响≤0.03%,一次性有效连续摄像时间最大可延长9.488s。有效减少了偏流角对图像质量的影响,延长了有效摄像时间,完全满足空间相机对偏流角的控制要求。
In order to decrease the influence on image quality caused by drift angle and prolong once availability continuum photography time,proposed a method of periodicity continuum adjusting drift angle at the preparation stage.First,analyzed system requirements in detail and presented adjusting tactic,and then introduced the composition and work principle of drift angle adjusting system,finally designed system and then carried out experimental verifying.The results show that once adjusting error is no larger than 40″,adjusting period is 512ms,drift angle is no more than 56″ in the beginning of photographing and over MTF is no larger than 0.03%,the most once availability continuum photography time can prolong 9.488s.It can efficiently decrease the influence on image quality caused by drift angle,prolong availability photography time and fully satisfy the requirements on drift control for space camera.
出处
《微计算机信息》
2011年第3期82-84,共3页
Control & Automation
关键词
空间相机
偏流角
周期性
连续
Space camera
Drift angle
Periodicity
Continuum
