TRANSMISSOMETER An electronic instrument system which provides a continuous record of the atmospheric transmission between two fixed points.
TRANSMISSOMETER: An instrument which measures the transmissivity of the atmosphere between two points for the determination of visual range.
transmissometer—An instrument system which shows the transmissivity of light through the atmosphere. Transmissivity may be translated either automatically or manually into visibility and/or runway visual range.
Photoelectric transmittance-meter An instrument for measuring the transmissivity of the atmosphere; a type of transmissometer. It consists of a constant-intensity collimated light source located at a suitable distance from a photoelectric cell.
Transmissometer: An instrument for determiming runway visibility located at the end of an airport runway.
Transpiration: When water in plants is transfered to a vapor into the atmosphere.
 See also: Meteor, Pressure, Atmosphere, Light, Wind Speed
  
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