forward scatter


Also found in: Wikipedia.

forward scatter

[¦fȯr·wərd ′skad·ər]
(communications)
Propagation of electromagnetic waves at frequencies above the maximum usable high frequency through use of the scattering of a small portion of the transmitted energy when the signal passes from an unionized medium into a layer of the ionosphere.
Collectively, the very-high-frequency forward propagation by ionospheric scatter and ultra-high-frequency forward propagation by tropospheric scatter communications techniques.
(geophysics)
The scattering of radiant energy into the hemisphere of space bounded by a plane normal to the direction of the incident radiation and lying on the side toward which the incident radiation was advancing.

forward scatter

forward scatterclick for a larger image
Troposphere scatter propagation.
The scattering of radiated energy into the hemisphere of space bounded by a plane normal to the direction of the incident radiation and lying on the side toward which the incident radiation was advancing. The opposite of backward scatter. In Rayleigh scattering, forward scatter accounts for half of the total. As the particle size increases above the Rayleigh limit, an increasing fraction of the total scattering is forward scattering. Rayleigh scattering is normal scattering of radiation by particles whose ruling size is 0.1 or less than that of the radiant wavelength. The scattering process may be polarization sensitive (i.e., incident waves that are identical in every respect but their polarization may be scattered differently).
References in periodicals archive ?
At lease 10,000 lymphocytes were selected for analysis through forward scatter side scatter (FSc / SSc) gating technique.
In this study, passive forward scattering radar is used to detect human crossing through the range of forward scatter region and to differentiate human size.
A 48 h exposure to trans-cinnamaldehyde (30 [micro]M) significantly decreased forward scatter and increased annexin-V-binding, effects paralleled by increase of [[[Ca.
Plasma cell populations were identified on the basis of dim CD45 expression and size on forward scatter slightly larger than that of a lymphocyte.
Forward scatter correlates with the red cell haemoglobin content (RBC-He), so the proportion of low forward scattered red cells (LScRBC) and high forward scattered %LScRBC: % of hypochromic RBCs < 17 pg.
It provides optical density and forward scatter turbidity measurements in the ultraviolet, visible, and near infra-red ranges.
Current visibility levels are measured using a Forward Scatter Technique in which a flash of xenon light is transmitted a short distance through the atmosphere, which scatters the light.
In addition, cell frequencies were determined by three methods: Scepter diameter plot, guava easy-Cyte forward scatter and antibody staining.
There is also a small number of observers who continue to make forward scatter radio observations of meteors using transmitting stations in Eastern Europe.
and subtracting that from the forward scatter intensity profile due to the droplets in order to get the Sauter mean diameter, [D.
Finally, he also considers a special case of bistatic radar, forward scattering radar for air detection and tracking, covering basic principles of forward scatter radar cross section, coverage area, target coordinate measurement, forward scatter radar with an array antenna, and design and experimental investigation.
Also, the new FS710 NIR Guage is a high accuracy forward scatter gauge capable of measuring basis weight in nonwovens applications.

Full browser ?