Effects of aerosol forward scatter on atmospheric coherence diameter: theory and validation

Dan Sadot; Norman S. Kopeika

doi:10.1117/12.137939

1 August 1992 Effects of aerosol forward scatter on atmospheric coherence diameter: theory and validation

Dan Sadot, Norman S. Kopeika

Proceedings Volume 1688, Atmospheric Propagation and Remote Sensing; (1992) https://doi.org/10.1117/12.137939
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

A correction to the definition of the atmospheric coherence diameter is suggested here. The basis of this new approach is the existence of an aerosol MTF which is often the dominant ingredient of the atmospheric MTF. As defined by Fried about 25 years ago, atmospheric MTF was related to turbulence MTF only. In the case of a Gaussian approximation of the aerosol MTF, an analytical expression is derived for the aerosol-caused coherence diameter. This parameter is related to the aerosol MTF's cutoff frequency, and to its asymptote at high spatial frequencies which was recently shown to be higher than the atmospheric transmittance. Qualitative validation of the theory is presented, based on measured MTFs in the open atmosphere. Overall atmospheric coherence diameter is generally the smaller between the turbulence and aerosol coherence diameters.

Citation Download Citation

Dan Sadot and Norman S. Kopeika "Effects of aerosol forward scatter on atmospheric coherence diameter: theory and validation", Proc. SPIE 1688, Atmospheric Propagation and Remote Sensing, (1 August 1992); https://doi.org/10.1117/12.137939

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available