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Proceedings Paper

Influence analysis of the scroll on the image quality of the satellite camera
Author(s): Chao Fan; Hong-wei Yi; Yi-tao Liang
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Paper Abstract

The object distance of the high-resolution satellite camera will be changed when the camera is scroll imaging, which will cause not only the alteration of the image scale, but also the variation of the velocity-height ratio (V/H) of the satellite. The change of the V/H of the camera will induce the asynchronization between the image motion and the traveling of the charge packet on the focal plane, which will deteriorate the image quality of camera seriously. Thus, the variable regulation of the relative velocity and the height of the scroll imaging of the satellite were researched, and the expression the V/H was deduced. Based on this, the influence of the V/H on the image quality was studied from two variable factors: the latitude and the scroll angle. To illustrate this effect quantitatively, using a given round polar orbit, the deterioration of the image quality caused by the scroll imaging was calculated for different integral number of the camera, and regulation interval of the row integration time and the range of the scroll angle were computed. The results showed that, when the integral number of the camera is equal to 32 and 64, the permitted scroll angle are equal to 29.5° and 16° respectively for MTFimage motion >0.95, which will give some helpful engineering reference to learn how the image quality changes during scroll imaging of the satellite camera.

Paper Details

Date Published: 6 August 2009
PDF: 6 pages
Proc. SPIE 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, 73840A (6 August 2009); doi: 10.1117/12.834163
Show Author Affiliations
Chao Fan, Henan Univ. of Technology (China)
Hong-wei Yi, Xi'an Institute of Optics and Precision Mechanics (China)
Yi-tao Liang, Henan Univ. of Technology (China)


Published in SPIE Proceedings Vol. 7384:
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications
Kun Zhang; Xiang-jun Wang; Guang-jun Zhang; Ke-cong Ai, Editor(s)

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