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Proceedings Paper

Validity of Kolmogorov turbulence at higher elevations
Author(s): Arkadi Zilberman; Ephim Golbraikh; Norman S Kopeika
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Paper Abstract

Atmospheric turbulence and aerosol particles are significant sources of laser-based and imaging system performance degradation. Quantitative estimation and characterization of turbulence and aerosol properties in the atmosphere therefore are very important for system development and applications (optical communications, laser weaponry, image restoration, etc.) To investigate the influence of aerosols and turbulence on laser-based sensing systems and to profile aerosol extinction, size distribution, and turbulence strength, a LIDAR system was developed. The new setup combines LIDAR and imaging techniques and permits measurement of aerosol and turbulence vertical profiles near simultaneously. It is usually assumed that the turbulent field is of the Kolmogorov type and calculations of intensity and angle of arrival fluctuations variance and other parameters for prediction of optical systems performance are based on this type of turbulence. However, we find that in the atmospheric boundary layer and at higher altitudes the turbulence can be different from Kolmogorov’s case. In this work, on the basis of LIDAR measurements, we investigate spectra of aerosol concentration fluctuations at different altitude elevations and at different wavelengths and use the results for turbulence strength profile retrieval. The turbulence profile retrieval technique is based on LIDAR measurements of angle of arrival fluctuation variance. Implications can be important for optical communication and imaging through the atmosphere.

Paper Details

Date Published: 27 January 2004
PDF: 9 pages
Proc. SPIE 5160, Free-Space Laser Communication and Active Laser Illumination III, (27 January 2004); doi: 10.1117/12.506848
Show Author Affiliations
Arkadi Zilberman, Ben-Gurion Univ. of the Negev (Israel)
Ephim Golbraikh, Ben-Gurion Univ. of the Negev (Israel)
Norman S Kopeika, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 5160:
Free-Space Laser Communication and Active Laser Illumination III
David G. Voelz; Jennifer C. Ricklin, Editor(s)

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