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Proceedings Paper

Power Spectra Of Turbulence-Induced Wave-Front Errors
Author(s): D. P. Greenwood
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Paper Abstract

For most applications, simplified models may be used to describe the power spectra of quantities affected by atmospheric turbulence. The atmospheric model consists of a layered structure of wind velocity and turbulence strength, which is found to adequately approximate the usual measured data. Power spectra of such quantities as log-amplitude, phase, phase-difference, arrival angle, and arrival-angle difference, are derived for a single turbulence layer located at an arbitrary position along the path. The individual spectra are appropriately scaled and added together to form a composite spectrum. In one example, of the arrival-angle spectrum, we see that the high frequency asymptotic dependence is no fixed power-law, but may be almost anything, depending on the wind and turbulence distribution.

Paper Details

Date Published: 18 August 1978
PDF: 7 pages
Proc. SPIE 0142, Optical Properties of the Atmosphere, (18 August 1978); doi: 10.1117/12.956531
Show Author Affiliations
D. P. Greenwood, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0142:
Optical Properties of the Atmosphere
Robert Sepucha, Editor(s)

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