Imaging through the atmosphere: practical instrumentation-based theory and verification of aerosol MTF

Dan Sadot; Norman S. Kopeika

doi:10.1117/12.137916

1 August 1992 Imaging through the atmosphere - Practical instrumentation-based theory and verification of aerosol MTF

Dan Sadot, Norman S. Kopeika

Proceedings Volume 1688, Atmospheric Propagation and Remote Sensing; (1992) https://doi.org/10.1117/12.137916
Event: Aerospace Sensing, 1992, Orlando, FL, United States

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.

Citation Download Citation

Dan Sadot and Norman S. Kopeika "Imaging through the atmosphere - Practical instrumentation-based theory and verification of aerosol MTF", Proc. SPIE 1688, Atmospheric Propagation and Remote Sensing, (1 August 1992); https://doi.org/10.1117/12.137916

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