Zobrazeno 1 - 9
of 9
pro vyhledávání: '"John Stephen deGrassie"'
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VII.
An accurate forecast of atmospheric turbulence is needed to characterize the performance of free-space electro-optical systems. Atmospheric turbulence physics is intricate and stochastic and relies on an assortment of assumptions, making modeling dif
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VI.
An accurate model and parameterization of aerosol concentration is needed to predict the performance of electro-optical imaging systems. Current models have been shown to vary widely in their ability to accurately predict aerosol size distributions a
Publikováno v:
SPIE Proceedings.
An accurate model and parameterization of fog is needed to increase the reliability and usefulness of electro-optical systems in all relevant environments. Current models vary widely in their ability to accurately predict the size distribution and su
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans IV.
We use Mixture Density Networks (MDN) to estimate atmospheric particle size distributions based upon metrological parameters. Measurements of particle size spectra show that distributions are often multi-modal, composed of various underlying aerosol
Autor:
Ana Ascencio, Steve Hammel, Eric Hallenborg, Galen Cauble, Kevin McBryde, Dimitri Tsintikidis, David T. Wayne, John Stephen deGrassie, Kristofor B. Gibson, Joshua J. Rudiger, Colin N. Reinhardt
Publikováno v:
SPIE Proceedings.
The Navy is actively developing diverse optical application areas, including high-energy laser weapons and free- space optical communications, which depend on an accurate and timely knowledge of the state of the atmospheric channel. The Optical Chann
Publikováno v:
SPIE Proceedings.
The fundamental principles of laser beam detection from atmospheric scattering are well understood and have been used to make successful predictions of received laser power at off-axis detectors. Furthermore, models have been developed that can corre
Publikováno v:
SPIE Proceedings.
The selection of the “optimal” operating wavelength for Free Space Optical (FSO) systems has been a subject of some ongoing controversy over the past several decades. Practical FSO systems have been found to suffer severe performance degradation
Publikováno v:
SPIE Proceedings.
A model for predicting the radiometry for a resolved laser beam due to scattering in the maritime atmosphere, has been developed by the Electro-Optics group in the Atmospheric Propagation Branch at SPAWAR Systems Center, Pacific. The model predicts t
Autor:
John Stephen deGrassie
Publikováno v:
SPIE Proceedings.
The detection and characterization of a laser by an off-axis receiver has been demonstrated and has been modeled to varying degrees of complexity and application. Within these models, many factors contribute to the received intensity at an off-axis r