Author: Michael W. Fitzmaurice
Publisher:
ISBN:
Category : Atmospheric chemistry
Languages : en
Pages : 196
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Book Description
The pertinent theoretical background and the results of a group of experiments conducted over 0.4- and 1.17-km near-ground horizontal ranges are presented. (1) The log-amplitude variances for HeNe (0.633 μm) and CO2 (10.6 μm) laser beams were found to have a ratio of 26.8, which is in close agreement with the predictions of Rytov-based spherical-wave theory. (2) Published measurements of the saturation level of the log-amplitude variance are reviewed and several inconsistencies noted. (3) The spatial correlation function of irradiance field was measured and found to agree with theory. The degree of correlation between different frequency beams which had traversed the same optical path was also measured and compared to theory. The data exhibited an unacceptably large scatter and did not show the wavelength dependence. (4) The log-normal, Rayleigh, and Rice probability distributions are discussed in terms of their applicability to irradiance statistics. Relatively weak 10.6 μm irradiance fluctuations were found to be equally well described by the log-normal and Rice distributions; strong fluctuations obtained at 0.488 μm were clearly best described by the log-normal distribution.
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 1054
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 380
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Albert D. Wheelon
Publisher: Cambridge University Press
ISBN: 113943960X
Category : Science
Languages : en
Pages : 462
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Book Description
The first volume of this set of books on electromagnetic scintillation dealt with phase and angle-of-arrival measurement errors, which are accurately described by geometrical optics. This second volume concentrates on amplitude and intensity fluctuations of the received signal.
Author: Larry C. Andrews
Publisher: SPIE Press
ISBN: 9780819441034
Category : Science
Languages : en
Pages : 408
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Book Description
Renewed interest in laser communication systems has sparked development of useful new analytic models. This book discusses optical scintillation and its impact on system performance in free-space optical communication and laser radar applications, with a detailed look at propagation phenomena and the role of scintillation on system behavior. Intended for practicing engineers, scientists, and students.
Author: Olga Korotkova
Publisher: Society of Photo Optical
ISBN: 9780819470539
Category : Science
Languages : en
Pages : 122
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Book Description
Includes Proceedings Vol. 7821
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1388
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Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1408
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 940
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