attenuation"1. (Also called extinction, especially in reference to optical frequencies.) A general term used to denote a decrease in signal strength in transmission from one point to another.
Attenuation - Any decrease in amplitude, density, or energy as result of an effect such as scattering, absorption, or friction. In physical meteorology, a reduction in radiation flow, especially solar radiation by atmospheric gases and aerosols.
attenuation—In radar meteorology, any process which reduces power density in radar signals.
precipitation attenuation—Reduction of power density because of absorption or reflection of energy by precipitation.
Attenuation
A reduction in the strength of a radar echo when there is widespread rainfall. The second problem tends to occur in sitations where there is widespread rainfall or convectve activity, such as when thunderstorms are occurring.
Attenuation Any process in which the flux density (power) of a beam of energy is dissipated.
Anticipated Convection (AC) The Day 1, Day 2, and Day 3 Convective outlooks issued by the Storm Prediction Center in Norman, Oklahoma.
Attenuation The decrease in the magnitude of current, voltage, or power of a signal in transmission between points. Attenuation may be expressed in decibels, and can be caused by interferences such as rain, clouds, or radio frequency signals.
Attenuation
It refers to the reduction of the radar beam power due to the reflection or absorption of energy when it strikes a target. The greatest attenuation occurs when the radar beam goes through very heavy rain.
ATTM ...
Precipitation Attenuation: The loss of energy that radar beam experiences as it passes through an area of precipitation.
Along with absorption, scattering is a major cause of the attenuation of radiation by the atmosphere. Scattered radiation Solar radiation scattered by particles in the atmosphere.
BandwidthThe frequency range between the lowest and highest frequencies that are passed through a component, circuit, or system with acceptable attenuation.BankIn hydrologic terms, the margins of a channel.
Daytime estimates of visibility are subjective evaluations of atmospheric attenuation of contrast, while nighttime estimates represent attempts to evaluate something quite different, namely, attenuation of flux density.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: attenuation, BEAM FILLING, Beam Width, Partial Beam Filling, Polarization Radar, POWER, precipitation attenuation, Scattering, Sidelobe, spectral density ...
SCATTERING COEFFICIENT: A measure of the attenuation due to scattering of light as it traverses a medium containing scattering particles.
SENSITIVITY: The ratio of the output of an instrument to the input (i.e. -gain).
Atmospherics: Interference to radio and TV communications caused by electrical storms.
Atom:An atom is the smallest part of an element that has the properties of that element.
Attenuation: In Radio: TV: Radar: Sound: A reduction in power.
 See also: Air, Radar, Water, Energy, Meteor
  
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