Influence analysis of the scroll on the image quality of the satellite camera

Chao Fan; Hong-wei Yi; Yi-tao Liang

doi:10.1117/12.834163

6 August 2009 Influence analysis of the scroll on the image quality of the satellite camera

Chao Fan, Hong-wei Yi, Yi-tao Liang

Proceedings Volume 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications; 73840A (2009) https://doi.org/10.1117/12.834163
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

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 MTF_{image motion} >0.95, which will give some helpful engineering reference to learn how the image quality changes during scroll imaging of the satellite camera.

Citation Download Citation

Chao Fan, Hong-wei Yi, and Yi-tao Liang "Influence analysis of the scroll on the image quality of the satellite camera", Proc. SPIE 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, 73840A (6 August 2009); https://doi.org/10.1117/12.834163

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KEYWORDS

Image quality

Cameras

Satellites

Satellite imaging

Modulation transfer functions

Remote sensing

CCD cameras

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