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Proceedings Paper

Influence of stratospheric turbulence on infrared imaging
Author(s): Mikhail S. Belen'kii; Alexander S. Gurvich
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Paper Abstract

We introduce a model for the power spectrum of stratospheric turbulence that is based on data from in situ measurements and on results of the theory of saturated internal gravity waves. We then study the effect of that stratospheric turbulence has on the scintillation, the coherence of starlight, and on the degradation of star image. It is shown that because the stratospheric phase structure function is approximately quadratic over distance comparable with the aperture of a large telescope, stratospheric turbulence does not significantly degrade short-exposure images of star but does degrade long-exposure ones. The influence of stratosphere on star image degradation is more important in the IR than in the visible range because of the specific dependence of the stratospheric coherence radius on the light wavelength. Star image motion and blurring are determined by different characteristics of the atmosphere and cannot be explained solely on the basis of Kolmogorov model. The modified astronomical imaging theory predicts greater improvement in resolution due to tilt removal than a conventional theory.

Paper Details

Date Published: 15 June 1995
PDF: 12 pages
Proc. SPIE 2471, Atmospheric Propagation and Remote Sensing IV, (15 June 1995); doi: 10.1117/12.211935
Show Author Affiliations
Mikhail S. Belen'kii, Georgia Institute of Technology (United States)
Alexander S. Gurvich, Georgia Institute of Technology and Institute of Atmospheric Physics (Russia)


Published in SPIE Proceedings Vol. 2471:
Atmospheric Propagation and Remote Sensing IV
J. Christopher Dainty, Editor(s)

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