An instrument for determining the dust content of a sample of air. Also spelled conimeter.

A hypothetical temperature characterized by a complete absence of heat and defined as 0 K, -273.15 C, or -459.67 F.

A wind vane used to obtain the horizontal and vertical components of the wind.

An air-launched balloon designed to be released in the eye of a tropical cyclone, float within the eye at predetermined levels, and transmit radio signals for RDF positioning.

An instrument used to measure and record earthquake vibrations and other earth tremors.

An aneroid barograph designed to record atmospheric pressure variations of very small magnitude.

The direction from which the wind is blowing, measured in points of the compass or in azimuth degrees.

Part of a computer word that has meaning in itself, often, a byte.

Same as radiation pattern. Anticyclone-An area of high atmospheric pressure which has a closed circulation that is anticyclonic (clockwise in northern hemisphere and counterclockwise in southern hemisphere).

A cover which fits over a large inflated balloon to facilitate handling in high or gusty winds.

See constant-level balloon.

A hygrometer based upon the diffusion of water vapor through a porous membrane.

A self-recording thermometer.

Central Processing Unit. The part of a computer which controls and directs all functions.

A high-altitude sounding system consisting of a small solid- propellant research rocket carried aloft by a large plastic balloon. The rocket is fired near the maximum altitude of the balloon flight.

The nautical mile is closely related to the geographical mile which is defined as the length of one minute of arc on the earth's equator. By international agreement, the nautical mile is now defined as 1852 meters.

A magnetometer of the electromagnetic type which is used to measure the horizontal intensity of the earth's magnetic field.

Sustained winds greater than or equal to 40 mph or gust greater than or equal to 58 mph.

The transducer's output when the maximum sensed value is applied to the transducer's input. For example, the F.S. output of a 4-20 mA transmitter is 20 mA, whereas its span is only 16mA.

The total of direct solar radiation and diffuse sky radiation received by a unit horizontal surface. Global radiation is measured by pyranometers.