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Proceedings Paper

Comparisons Of The Transverse Coherence Length And Isoplanatic Angle From Measurements Taken With The Flatlands Very High Frequency Radar, Optical Techniques, And Thermosondes
Author(s): F. Eaton; J. Brown; W Clark; D. Favier; K Gage; J L Green; W Hatch; J Hines; E Murphy; G Nastrom
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Paper Abstract

Comparisons are made of the transverse coherence length (ro) and isoplanatic angle (θo) derived from measurements taken with the Flatlands very high frequency (VHF) radar, an ro system, an isoplanometer, and temperature fluctuation sensors mounted on a thermosonde. The measurements were conducted at the Flatlands location near Urbana, Illinois, from 7-13 June 1988. The site was selected because of the lack of orographic effects on airflow and the refractive index structure parameter (Cn2). The radar was operated with alternating beams in the north and east directions at 20° zenith angle in order to avoid contamination by specular reflections. Contributions of the refractive index structure parameter (Cn2) from different altitudes above ground to the integrated-path ro and θo values are presented and discussed. Diurnal variations of ro and θo obtained from the suite of instruments are shown with particular emphasis on the "neutral" events. Measured results are compared to results from the Aeronomy Laboratory's theoretical model of Cn2.

Paper Details

Date Published: 8 August 1989
PDF: 10 pages
Proc. SPIE 1060, Nonlinear Optical Beam Manipulation and High Energy Beam Propagation Through the Atmosphere, (8 August 1989); doi: 10.1117/12.951737
Show Author Affiliations
F. Eaton, U.S. Army Atmospheric Sciences Laboratory (United States)
J. Brown, Air Force Geophysics Laboratory (United States)
W Clark, National Oceanic and Atmospheric Administration (United States)
D. Favier, U.S. Army Atmospheric Sciences Laboratory (United States)
K Gage, National Oceanic and Atmospheric Administration (United States)
J L Green, National Oceanic and Atmospheric Administration (United States)
W Hatch, U.S. Army Atmospheric Sciences Laboratory (United States)
J Hines, U.S. Army Atmospheric Sciences Laboratory (United States)
E Murphy, Air Force Geophysics Laboratory (United States)
G Nastrom, Cloud State University (United States)


Published in SPIE Proceedings Vol. 1060:
Nonlinear Optical Beam Manipulation and High Energy Beam Propagation Through the Atmosphere
Robert A. Fisher; LeRoy E. Wilson, Editor(s)

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