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Proceedings Paper

Imaging through the atmosphere: practical instrumentation-based theory and verification of aerosol MTF
Author(s): Dan Sadot; Norman S. Kopeika
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Paper Abstract

A practical instrumentation-based atmospheric aerosol MTF which is a modification of the classical aerosol MTF theory is proposed. The approach based on radiative transfer theory takes into account the effect of finite field-of-view, finite dynamic sensitivity, and finite spatial bandwidth of every existing imaging system. The asymptote value of the measured aerosol MTF approaches at high spatial frequencies is found to be significantly higher than the theoretical prediction of turbid medium transmittance. It is concluded that the aerosol MTF cannot be referred to as constant attenuation, and in many cases it is the dominant part in the actual overall atmospheric MTF. An image resolution-image irradiance relationship can be determined by the system designer through considering field-of-view, instrumentation dynamic range, and spatial frequency bandwidth. It is necessary to choose between imaging of faint and bright objects at the expense of image quality, or imaging of either faint or bright objects with improved image quality.

Paper Details

Date Published: 1 August 1992
PDF: 15 pages
Proc. SPIE 1688, Atmospheric Propagation and Remote Sensing, (1 August 1992); doi: 10.1117/12.137916
Show Author Affiliations
Dan Sadot, Ben-Gurion Univ. of the Negev (Israel)
Norman S. Kopeika, Ben-Gurion Univ. of the Negev (Israel)


Published in SPIE Proceedings Vol. 1688:
Atmospheric Propagation and Remote Sensing
Anton Kohnle; Walter B. Miller, Editor(s)

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