We present a detailed investigation, qualitative and quantitative, on how the atmospheric turbulence with a non-Kolmogorov power spectrum affects the major statistics of stochastic electromagnetic beams, such as the spectral composition and the states of coherence and polarization. We suggest a detailed survey on how these properties evolve on propagation of beams generated by electromagnetic G...

Specific objectives include: 1) test the nonlocal mixing parameterization using a Large-Eddy Simulation (LES) model and incorporate it into a mesoscale model, 2) further develop the Lagrangian random particle dispersion model and test its turbulence parameterization, and 3) further develop a system for evaluating atmospheric models using tracer measurements. This work is supported by the Office...

Joint effects of aperture averaging and beam width on the performance of free-space optical communication links, under the impairments of atmospheric loss, turbulence, and pointing errors (PEs), are investigated from an information theory perspective. The propagation of a spatially partially coherent Gaussian-beam wave through a random turbulent medium is characterized, taking into account the ...

The long term goals are: 1/ To understand the impact of complex coastal terrain and/or coastline orientation on the structure of the coastal marine atmospheric boundary layer (MABL); 2/ To study the effect on the atmospheric forcing of the coastal ocean, by the the local flow induced by the coastal terrain, including possible feedback mechanisms.; 3/ To understand the internal turbulence struct...

We analyze the performance of a free-space optical (FSO) link affected by atmospheric turbulence and line-of-sight (LOS) blockage. For this purpose, the atmospheric turbulence induced fading is modeled by the ℳ distribution, which includes the Gamma-Gamma distribution as special case. We exploit the fact that the physical interpretation of the ℳ distribution allows to split the optical energy t...

Acoustic data collected in static rocket tests are typically influenced by ground reflections, but have been difficult to account for. First, the rocket plume is an extended radiator whose directionality results from source correlation. Second, partial coherence of the ground interaction due to atmospheric turbulence can play a significant role, especially for larger propagation distances. In t...

Space diversity is one of the important techniques of overcoming the influence of atmospheric turbulence on laser communication. Having analyzed the theory of diversity technique, the paper has focused on researching the space diversity technique and established the joint probability density function of the threshold value. Outage probability is studied in laser communication and get the variat...

Atmospheric turbulence is an important factor that limits the amount of attenuation a barrier can provide in the outdoor environment. It is therefore important to develop a reliable method to predict its effect on barrier performance. The boundary element method (BEM) has been shown to be a very effective technique for predicting barrier insertion loss in the absence of turbulence. This paper d...

Overview of mercury measurements in the Antarctic troposphere A. Dommergue, F. Sprovieri, N. Pirrone, R. Ebinghaus, S. Brooks, J. Courteaud, and C. Ferrari Laboratoire de Glaciologie et Géophysique de l’Environnement, CNRS – Université Joseph Fourier Grenoble, 54 Rue Molière, 38400 St Martin d’Hères, France CNR – Institute on Atmospheric Pollution Research, Division of Rende, Italy GKSS Researc...

The theoretical foundations of an optical array receiver consisting of relatively small telescopes are developed and analyzed. It is shown that optical array receivers can be designed to perform as well as a large single-aperture receiver on the ground, while enjoying significant advantages in terms of operational reliability, ease of future expansion to achieve greater capacity, and further ad...