Meteorology: Random Listings RSS

The ratio of the existing amount of water vapor in the air at a given temperature to the maximum amount that could exist at that temperature. Usually expressed in percent.

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See sea-water thermometer, reversing thermometer.

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Name sometimes given to a transmissometer.

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See hook gauge.

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The process of modifying some characteristic of a wave (the carrier) so that it varies in step with the instantaneous value of another wave (the modulating wave) in order to transmit a message. The modified characteristic may be frequency, phase, and/or a ...

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A large body of air having similar horizontal temperature and moisture characteristics.

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A radar term for a single pulse of radio energy.

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American Standard Code for Information Interchange. A standard code used to represent data using 8 bits (7 data bits and I parity bit) per character.

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A type of wind vane having a split or V-shaped tail. The apex orients itself to the direction of the wind.

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Hygrometer in which the dew (frost) point is determined by observing the temperature of an artificially cooled surface at the moment at which dew (frost) first appears on it.

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Same as constant-level balloon.

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A feeble oscillatory disturbance of the earth's crust, detectable only by very sensitive seismographs. Certain types of microseisms seem to be closely correlated with pressure disturbances. See microbarm.

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An instrument for measuring the pressure of the atmosphere. The two principle types are aneroid and mercurial.

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A set of weekly colored rainbow arcs sometimes discernable inside a primary rainbow.

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An instrument for measuring the difference between incoming and outgoing terrestrial radiation.

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A sounding balloon which, when operationally inflated, resembles an inverted teardrop.

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A scale with the ice point at zero degrees and the boiling point of water at 80 degrees, with pressure of one atmosphere.

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The change in the measured transducer output caused by changes in ambient temperature. Usually expressed a percentage of full scale.

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A system of physical units based on the use of the centimeter, gram. and the second as elementary quantities of length. mass. and time.

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An instrument used for the determination of the electrical conductivity of the atmosphere.

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