Journal ArticleDOI
Measurement and modeling of scintillation intensity to estimate turbulence parameters in an Earth-space path
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TLDR
In this paper, the theoretical and experimental aspects of the analysis of amplitude scintillations as a possible remote-sensing tool of atmospheric turbulence parameters with special emphasis on earth-space paths are explored.Abstract:
The theoretical and experimental aspects of the analysis of amplitude scintillations as a possible practical remote-sensing tool of atmospheric turbulence parameters with special emphasis on earth-space paths are explored. Theoretical studies and experimentation reveal that the scintillation variance when complemented with spectral analysis and suitable modeling of the path leads to realistic values of the parameters. A layered turbulent structure has been studied in particular, the strategy of data analysis is given in detail, and the limitations due to the cross-path wind profile are discussed.read more
Citations
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Journal ArticleDOI
Scattering induced microwave scintillations from clear air and rain on earth space paths and the influence of antenna aperture
J. Haddon,E. Vilar +1 more
TL;DR: In this article, the variance and spectrum of amplitude scintillations due to scattering in both turbulent clear air and rain, are investigated and the important aspect of antenna aperture smoothing with special emphasis on earth-space paths and the equations derived are applicable to system design and remote sensing.
Patent
Method and system for down-converting an electromagnetic signal
David F. Sorrells,Michael J. Bultman,Robert W. Cook,Richard C. Looke,Charley D. Moses,Gregory S. Rawlins,Michael W. Rawlins +6 more
TL;DR: In this paper, the authors proposed a method for down converting a modulated carrier signal to a demodulated baseband signal, which requires that at least some of the energy stored in the first storage device is discharged when the first switch is off.
Journal ArticleDOI
Propagation of electromagnetic waves in Kolmogorov and non-Kolmogorov atmospheric turbulence: three-layer altitude model
TL;DR: A model of turbulence spectra changing with altitude on the basis of obtained experimental and theoretical data for turbulence profile in the troposphere and lower stratosphere is suggested.
Patent
Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
David F. Sorrells,Michael J. Bultman,Robert W. Cook,Richard C. Looke,Charley D. Moses,Gregory S. Rawlins,Michael W. Rawlins +6 more
TL;DR: In this paper, the authors described a system for down-converting and up-concussing an EM signal by recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal.
Patent
Method and system for ensuring reception of a communications signal
TL;DR: In this article, a modulating baseband signal with desired information is accepted, and a plurality of redundant spectrums is generated, each redundant spectrum comprises the necessary amplitude, phase, and frequency information to substantially reconstruct the modulating BS signal.
References
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Journal ArticleDOI
Electromagnetic beam propagation in turbulent media
TL;DR: In this article, the most recent developments on the propagation of optical beams in a turbulent medium, such as the clear atmosphere, are reviewed, including beam spreading, beam wander, loss of coherence, scintillations, angle-of-arrival variations, and short-pulse effects.
Journal ArticleDOI
A survey of clear-air propagation effects relevant to optical communications
R.S. Lawrence,J.W. Strohbehn +1 more
TL;DR: In this paper, the theory and observations of the optical propagation effects of the clear turbulent atmosphere are reviewed, with particular attention to those characteristics most important to the designer of an optical communication system.
Journal ArticleDOI
Evidence far a k−5/3 Law Inertial Range in Mesoscale Two-Dimensional Turbulence
TL;DR: The observational evidence for k−5/3 law behavior in the atmospheric kinetic energy spectrum is reviewed in this paper, which includes the results of atmospheric wind variability studies and the observed scale dependence of atmospheric dispersion.
Journal ArticleDOI
Line-of-sight wave propagation through the turbulent atmosphere
TL;DR: A review of the recent developments in the field of random fluctuations of an electromagnetic wave propagated over a line-of-sight path is presented in this paper, where the major interest is in the optical to millimeter wavelength range where fluctuations in amplitude, phase, and angle of arrival are important system considerations.
Journal ArticleDOI
Laser irradiance propagation in turbulent media
TL;DR: The results obtained in recent years on laser irradiance propagation in random weakly inhomogeneous media with large scale index of refraction fluctuations are reviewed in this article, where the effects of multiple scattering are greatly pronounced.
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Scattering induced microwave scintillations from clear air and rain on earth space paths and the influence of antenna aperture
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