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| Author | : M. W. Fitzmaurice |
| Publisher | : |
| Total Pages | : 20 |
| Release | : 1969 |
| Genre | : Atmospheric radiation |
| ISBN | : |
Laser beam scintillation and log-amplitude variance evaluation for wavelengths on digital computer.
| Author | : M. W. Fitzmaurice |
| Publisher | : |
| Total Pages | : 8 |
| Release | : 1969 |
| Genre | : |
| ISBN | : |
| Author | : Larry C. Andrews |
| Publisher | : SPIE Press |
| Total Pages | : 408 |
| Release | : 2001 |
| Genre | : Science |
| ISBN | : 9780819441034 |
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 | : Larry C. Andrews |
| Publisher | : SPIE-International Society for Optical Engineering |
| Total Pages | : 820 |
| Release | : 2005 |
| Genre | : Science |
| ISBN | : |
Since publication of the first edition of this text in 1998, there have been several new, important developments in the theory of beam wave propagation through a random medium, which have been incorporated into this second edition. Also new to this edition are models for the scintillation index under moderate-to-strong irradiance fluctuations; models for aperture averaging based on ABCD ray matrices; beam wander and its effects on scintillation; theory of partial coherence of the source; models of rough targets for ladar applications; phase fluctuations; analysis of other beam shapes; plus expanded analysis of free-space optical communication systems and imaging systems.
| Author | : G. R. Ochs |
| Publisher | : |
| Total Pages | : 17 |
| Release | : 1969 |
| Genre | : Laser beams |
| ISBN | : |
| Author | : G. R. Ochs |
| Publisher | : |
| Total Pages | : 28 |
| Release | : 1969 |
| Genre | : Laser beams |
| ISBN | : |
Log-amplitude variance and covariance of the scintillation of a diverging optical beam have been measured over a 48-hr period at a wavelength of 0.63[mu], on a 490 and 1000 m optical paths 2 m above the surface of a flat mesa near Boulder, Colorado. Simultaneous measurements of the refractive-index structure of the atmosphere have been obtained from temperature-structure-function measurements at spacings of 1, 3, and 10 cm. A saturation of scintillation occurs for values of log-amplitude variance between 0.5 and 1. After reaching a peak, the log-amplitude variance then decreases with both increasing range and increasing refractive-index turbulence. The spatial covariance of the fluctuations tends to increase in the saturation region. In the unsaturated region, the log-amplitude variance is approximately that predicted by the spherical-wave propagation theory of Tatarski.
| Author | : Cynthia Y. Young |
| Publisher | : |
| Total Pages | : 416 |
| Release | : 2001-07-30 |
| Genre | : |
| ISBN | : 9781510604896 |
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 | : National Aeronautics and Space Administration (NASA) |
| Publisher | : Createspace Independent Publishing Platform |
| Total Pages | : 34 |
| Release | : 2018-07-11 |
| Genre | : |
| ISBN | : 9781722794323 |
The temporal spectral density of the log-amplitude scintillation of a laser beam wave due to a spatially dependent vector-valued crosswind (deterministic as well as random) is evaluated. The path weighting functions for normalized spectral moments are derived, and offer a potential new technique for estimating the wind velocity profile. The Tatarskii-Klyatskin stochastic propagation equation for the Markov turbulence model is used with the solution approximated by the Rytov method. The Taylor 'frozen-in' hypothesis is assumed for the dependence of the refractive index on the wind velocity, and the Kolmogorov spectral density is used for the refractive index field. Balakrishnan, A. V. Ames Research Center NCC2-374...
| Author | : Albert D. Wheelon |
| Publisher | : Cambridge University Press |
| Total Pages | : 462 |
| Release | : 2003-07-31 |
| Genre | : Science |
| ISBN | : 113943960X |
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 | : |
| Publisher | : |
| Total Pages | : 320 |
| Release | : 1969 |
| Genre | : |
| ISBN | : |
