Power Spectra Of Turbulence-Induced Wave-Front Errors

D. P. Greenwood

doi:10.1117/12.956531

18 August 1978 Power Spectra Of Turbulence-Induced Wave-Front Errors

D. P. Greenwood

Proceedings Volume 0142, Optical Properties of the Atmosphere; (1978) https://doi.org/10.1117/12.956531
Event: 1978 Technical Symposium East, 1978, Washington, D.C., United States

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.

Citation Download Citation

D. P. Greenwood "Power Spectra Of Turbulence-Induced Wave-Front Errors", Proc. SPIE 0142, Optical Properties of the Atmosphere, (18 August 1978); https://doi.org/10.1117/12.956531

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