The maximum difference in output for any given input (within the specified range) when the value is approached first with increasing, and then with decreasing, input signals. Caused by energy absorption in the elements of the measuring instrument. Usually ...

An instrument of the aspiration condenser type which measures the concentration and mobility of small ions.

In folklore, a name for rain.

Infrared radiation emitted by or being propagated through the atmosphere.

Reduction of visibility by strong winds blowing across dry ground with little or no vegetation. Visibilities of 1/8 mile or less over a widespread area are criteria for a Blowing Dust Advisory.

The correction applied to an instrument to account for the effect of temperature upon its response characteristics.

A small balloon, loaded with ballast and inflated so that it will explode at a predetermined altitude, which is attached to a larger balloon.

Wind with a speed between 7 and 10 knots (8 and 12 mph), Beaufort scale number 3.

A recording variometer.

A recording anemometer.

A temperature scale with the ice point at 273 degrees and boiling point of water at 373 degrees. It is intended to approximate the Kelvin temperature scale with sufficient accuracy for many sciences, notably meteorology.

The envelope of air surrounding the earth and bound to it more or less permanently by virtue of the earth's gravitational attraction. The system whose chemical Properties. dynamic motions, and physical processes constitute the subject matter of meteorolog ...

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

Same as freezing point.

Same as ceiling light.

A balloon designed to float at a constant pressure level. This may be accomplished by a pressure valve which controls the release of ballast so as to maintain flight above a selected pressure level until the supply of ballast is exhausted. See Moby Dick b ...

A colloquial term in western Australia for a squall, associated with thunder, on the northwest coast in summer.

Temperature of equilibrium between the liquid and vapor phases of a substance at a given pressure.

A radar term for a single pulse of radio energy.

An instrument for measuring angles of inclination. Used in conjunction with a ceiling light to measure cloud height at night.