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Coherent 1-micron lidar measurements of atmospheric-turbulence-induced spatial decorrelation using a multielement heterodyne detector arrayA coherent 1-micron Nd:YAG lidar system is employed to measure directly the reduced spatial coherence length rho 0 of the lidar returns caused by atmospheric turbulence. The experiments were conducted by using a 2 x 2 heterodyne detector array, which permitted real-time spatial correlation measurements of the lidar returns at two different detector spacings. The spatial correlation coefficients and spatial coherence length of the lidar returns from a hard target were measured during a day-to-night time period when the atmospheric turbulence parameter, Cn-squared, was measured to vary from 2 x 10 exp -13 to 2 x 10 exp -4 m exp -2/3. These directly measured values of rho 0 as a function of Cn-squared were found to be in good agreement with theoretical predictions.
Document ID
19920051362
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chan, Kin P.
(NASA Langley Research Center Hampton, VA, United States)
Killinger, Dennis K.
(South Florida, University Tampa, FL, United States)
Date Acquired
August 15, 2013
Publication Date
April 1, 1992
Publication Information
Publication: Applied Optics
Volume: 31
ISSN: 0003-6935
Subject Category
Instrumentation And Photography
Accession Number
92A33986
Distribution Limits
Public
Copyright
Other

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