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Optical scintillometer for simultaneous measurements of atmospheric Cn 2 and winds

Sharma, S and Devara, PCS and Raj, PErnest and Pandithurai, G (1994) Optical scintillometer for simultaneous measurements of atmospheric Cn 2 and winds. IETE Journal of Research, 40 (2-3). pp. 101-104.

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Abstract

Laser scintillations produced due to the inhomogeneities present in the atmosphere can be used for measuring refractive index structure parameter (Cn 2) as well as wind velocity. The present paper deals with the description of an optical scintillometer developed at the Indian Institute of Tropical Meteorology (IITM), Pune, India for simultaneous measurements of path-averaged Cn 2 and crosswinds. Different evaluation techniques and their relative merits for wind estimation from optical scintillometer observations are discussed. The results show good agreement between the scintillometer evaluated winds and the winds measured simultaneously by using propeller anemometer at the same location. In addition, this paper explains the effect of Cn 2 and wind fluctuations along the pathlength on the derived wind information from scintillometer observations.

Item Type: Article
Additional Information: Copyright of this article belongs to IETE, New Delhi, India
Uncontrolled Keywords: Anemometers; Atmospheric optics; Atmospheric turbulence; Electromagnetic wave interference; Ionospheric electromagnetic wave propagation; Laser beams; Refractive index; Scintillation; Velocity measurement; Wind, Laser scintillations; Refractive index structure parameter; Wind velocity, Scintillation counters
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 19 May 2015 06:01
Last Modified: 19 May 2015 06:01
URI: http://moeseprints.incois.gov.in/id/eprint/1046

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