Journal ArticleDOI
Propagation experiments in low-visibility atmospheres.
Reads0
Chats0
TLDR
Multipath and angular spectrum measurements made under a variety of weather conditions over a 13.6-km line-of-sight propagation path are reported to examine the dependence of scattered plus unscattered optical transmission on optical thickness.Abstract:
An experimental program aimed at measuring critical channel parameters of atmospheric optical communication channels under low-visibility weather conditions is described. Multipath and angular spectrum measurements made under a variety of weather conditions over a 13.6-km line-of-sight propagation path are reported. The latter measurements are used to examine the dependence of scattered plus unscattered optical transmission on optical thickness.read more
Citations
More filters
Journal ArticleDOI
Electromagnetic beam propagation in turbulent media: An update
TL;DR: In this article, the authors reviewed the recent developments on wave propagation in turbulent media, including adaptive optics, intensity scintillations, pulse propagation, atmospheric measurements at visible, IR, and millimeter wave frequencies, speckle interferometry, and other related topics.
Journal ArticleDOI
Blue-green pulsed propagation through fog.
TL;DR: In this paper, a blue-green pulsed propagation through fog has been analyzed and three distinct regions for energy transport have been identified: Region I small number of attenuation lengths τ in the path (0 32), the direct beam and the forwardscattered beam have decayed to the point where the diffusion type multiple-scattered radiation is the dominant energy received.
Journal ArticleDOI
Temporal and angular spreading of blue-green pulses in clouds.
Gregory C. Mooradian,Myer Geller +1 more
TL;DR: The first blue-green laser propagation measurements through clouds that simulate the geometry of a satellite-to-ground communication link were made and it was shown that the pulses could in general be represented by a linear combination of two modified gamma functions.
Journal ArticleDOI
Over-the-horizon optical propagation in a maritime environment.
TL;DR: An experimental-theoretical program aimed at characterizing over-the-horizon (OTH) propagation via marine atmospheric aerosols through particulate multiple scatter and good agreement between both models and experiments is shown.
Journal ArticleDOI
Significance of higher-order multiple scattering for laser beam propagation through hazes, fogs, and clouds: errata
TL;DR: An approach is outlined for computing the different orders of scattering in any medium that possesses a phase function with a strong forward peak and the formulation adopted does reproduce the natural divergence of general Gaussian beams without the need to assume the presence of point sources or theneed to assume perfectly collimated beams within the region of interest.
References
More filters
Journal ArticleDOI
A Communication Technique for Multipath Channels
R. Price,P. E. Green +1 more
TL;DR: Application of principles of statistical communication theory has led to a new communication system, called Rake, designed expressly to work against the combination of random multipath and additive noise disturbances, which indicate that such systems have certain optimal properties.
Journal ArticleDOI
Computer simulation of light pulse propagation for communication through thick clouds.
TL;DR: The amount and distribution of multipath time spreading was found to be independent of the detailed shape of the scattering function for sufficiently thick clouds, and the amount of multipATH spreading for many scattering functions and cloud thicknesses can be predicted from a common set of data.
Journal ArticleDOI
Experiments on light pulse communication and propagation through atmospheric clouds.
TL;DR: The extent of this multipath pulse spreading can be shown to be comparable to that predicted from computer simulation models and relatively small changes in the gross cloud shape produced a change in the received signal intensity.
Journal ArticleDOI
Communication through optical scattering channels: An introduction
TL;DR: The theoretical possibilities of communicating through scattering channels are considered and it is found that the error probability depends only upon the total received signal energy if certain noise thresholds are exceeded; below these thresholds the performance deteriorates rapidly.