Error analysis and ground verification of high resolution space camera real-time drift angle adjustment

	Error analysis and ground verification of high resolution space camera real-time drift angle adjustment
	Wang D.; Yan D.; Wu W.; Sun T.
	2014
发表期刊	Yi Qi Yi Biao Xue Bao/中文 Journal of Scientific Instrument
ISSN	ISBN/02543087
卷号	35 期号:9 页码:1955-1962
摘要	In order to meet the requirements of long time continuous earth observation with high resolution space camera, the formation reason for one of the main factors affecting the image quality on orbit, the drift angle, is analyzed. A strategy is proposed, which adds the drift angle adjustment mechanism on high resolution camera and adjusts the drift angle in real time in the imaging process. The errors affecting drift angle adjusting precision are listed. The analysis focalizes on the additional errors of mechanism adjustment. An additional error calculation model is built. The relation graph between mechanism adjusting speed and adjusting error is provided. In the error budget of a certain real system, when the drift angle adjusting speed is less than 14'/s and the additional error is not over 3', the long term continuous imaging requirement of 96-scale TDI CCD is met, and the MTF declination is less than 5%. To verify the correctness of the adjusting strategy, a closed-loop ground test system for the real time drift angle adjustment was established using a dynamic target generator to simulate the relative motion between the space camera and target; the experiment verification of the real time drift angle adjusting was conducted under the condition that the drift angle varies at constant speed and variable speed. During the ground experiment verification, the real time drift angle adjustment can achieve good target tracking. In the entire 4 minute continuous imaging, the obtained dynamic image is clear throughout; the vertical-to-orbit MTF declination is less than 0.008, which proves the effectiveness and feasibility of the real time drift angle adjustment strategy of space camera.
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/43970
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Wang D.,Yan D.,Wu W.,et al. Error analysis and ground verification of high resolution space camera real-time drift angle adjustment[J]. Yi Qi Yi Biao Xue Bao/中文 Journal of Scientific Instrument,2014,35(9):1955-1962.
APA	Wang D.,Yan D.,Wu W.,&Sun T..(2014).Error analysis and ground verification of high resolution space camera real-time drift angle adjustment.Yi Qi Yi Biao Xue Bao/中文 Journal of Scientific Instrument,35(9),1955-1962.
MLA	Wang D.,et al."Error analysis and ground verification of high resolution space camera real-time drift angle adjustment".Yi Qi Yi Biao Xue Bao/中文 Journal of Scientific Instrument 35.9(2014):1955-1962.

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