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Proceedings Paper

Overview Of Imaging Through The Atmosphere
Author(s): N. S. Kopeika
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Paper Abstract

Turbulence, atmospheric background, and aerosol forward scattering modulation transfer functions 0M Fs) are analyzed. For diagonal or vertical imaging turbulence is seen to limit image quality only at very high spatial frequencies, where degradation is likely to take place anyway as a result of vibration and diffraction. Background and aerosol MTFs limit law spatial frequency contrast as well. For long-range horizontal lines-of-sight near ground level, both turbulence and forward scattering by aerosols severely limit image quality. Numerical examples are presented. These limitations can be overcome somewhat by proper selection of the imaging wavelength and of operation timing. This analysis can aid in sensor selection for system design from the standpoints of both wavelength selection and sensor resolution. Because this analysis includes the effects of weather changes on image propagation through the atmosphere, and a model for predicting image quality as a function of weather forecast, it also can aid in selecting operation timing on the basis of weather forecasts, with a view toward optimizing expected resolution.

Paper Details

Date Published: 24 August 1988
PDF: 16 pages
Proc. SPIE 0928, Modeling of the Atmosphere, (24 August 1988); doi: 10.1117/12.975617
Show Author Affiliations
N. S. Kopeika, Ben-Gurion University of the Negev (United States)

Published in SPIE Proceedings Vol. 0928:
Modeling of the Atmosphere
Laurence S. Rothman, Editor(s)

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