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Study of laser scintillation in different atmospheric conditions

Raj, PE and Sharma, S and Devara, PCS and Pandithurai, G (1993) Study of laser scintillation in different atmospheric conditions. Journal of Applied Meteorology, 32 (6). pp. 1161-1167.

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Laser scintillation observations were carried out over a flat surface in different atmospheric conditions on 33 separate days during March 1990-April 1991 and were analyzed and studied. The principal results of the analysis reveal: 1) marked seasonal variations in optical turbulence (through the measurement of refractive-index structure function Cn 2) and scintillation intensity (measured in terms of percent modulation Pm), 2) close correspondence among the variations in Cn 2, Pm, and atmospheric temperature; 3) lower values of Cn 2 during cloud sky as compared to clear sky conditions; and 4) agreement between the observations and theory in respect of the pathlength dependence of Cn 2 and Pm. The results are discussed with reference to the possible meteorological origin of turbulence, and the importance of the study for making measurements of optical turbulence remotely over inaccessible regions is highlighted.

Item Type: Article
Additional Information: Copyright of this article belongs to American Meteorological Society
Uncontrolled Keywords: clear sky; cloudy sky; laser scintillation, India, Maharashtra, Pune
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 02 Jun 2015 09:24
Last Modified: 02 Jun 2015 09:24

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