Visibility and Fog Drop Size Spectra at Misawa Air Base

Mobilized and Mobilizable Visibility Distances for Road Visibility in Fog

Fog is a challenging problem for road safety. To estimate the fog density and estimate the meteorological visibility distance, some attempts using an in-vehicle cameras are being developed. To complete the notion of meteorological visibility, we propose to estimate the distance to the most distant visible object belonging to the road surface. We call this distance the mobilized visibility dista...

Wavelet Transform for Analyzing Fog Visibility

A GROWING NUMBER OF COMputer-vision systems have emerged for traffic analysis and control. Increased traffic, along with steady efforts to improve driver security, have encouraged the development of sophisticated video-based systems, providing statistical measures of traffic flow for actual traffic information on variable message signs. Investigations show that VMS reduce traffic jams, thus min...

On the Drop-Size Dependence of Organic Acid and Formaldehyde Concentrations in Fog

Concentration differences between small (r < 8.5 μm) and large droplets (r > 8.5 μm) were observed for formic acid, acetic acid and formaldehyde in fog droplets collected in California’s Central Valley. The concentration ratios (large/small droplets) of these compounds were investigated by a stepwise model approach. Assuming thermodynamic equilibrium (KH) results in an overestimate of the conce...

Mean Drop Size and Drop Size Distribution in a Hanson Mixer-Settler Extraction Column

Prediction of drop size distribution parameters for optical wireless communications through moderate continental fog

Wireless Optical Communication Links (OCL), or Free Space Optics (FSO) links involving optical ground stations (OGS) are highly influenced by the earth atmosphere due to the interaction of the optical wave with particles of different size and shape. Fog, clouds, rain and snow cause significant signal attenuation thus limiting the performance of OCL. In this paper, we consider the behavior of OC...