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Proceedings Paper

Optical Scintillometer/Doppler Radar Instrument For Profiling Turbulence
Author(s): James H. Churnside; Steven F. Clifford
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Paper Abstract

The scintillation of starlight contains information about the refractive turbulence strength in the atmosphere. The fluctuations to each two-dimensional spatial wavenumber in the scintillation pattern are caused by turbulent features that have the same two-dimensional wavenumber. Therefore, a receiver that spatially filters the scintillations in starlight can measure the amount of turbulence in the atmosphere in a narrow band of wavenumbers. If the entire atmosphere were moving with constant velocity, the dominant wavenumber would produce a constant frequency as the turbulence moved across the filter. However, wind velocity typically varies with altitude, and turbulence at different altitudes will produce different frequencies. If the wind velocity profile is known, the vertical profile of Cn2 can be inferred from the frequency distribution of scintillations at a particular wavenumber.

Paper Details

Date Published: 11 October 1989
PDF: 8 pages
Proc. SPIE 1115, Propagation Engineering, (11 October 1989); doi: 10.1117/12.960869
Show Author Affiliations
James H. Churnside, NOAA/ERL/Wave Propagation Laboratory (United States)
Steven F. Clifford, NOAA/ERL/Wave Propagation Laboratory (United States)

Published in SPIE Proceedings Vol. 1115:
Propagation Engineering
Norman S. Kopeika; Walter B. Miller, Editor(s)

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