An instrument which measures the effective terrestrial radiation. See Angstrom pyrgeometer.

The record of an aneroid barograph.

The level at which ice crystals and snowflakes melt as they descend through the atmosphere.

A special type of radar target, usually a comer reflector, tied beneath a free balloon and designed to be an efficient reflector of radio energy.

A thermometer with a muslin-covered bulb which is moistened. used to measure wet-bulb temperature.

An instrument for measuring the pressure of gases and vapors. A mercury barometer is a type of manometer.

See radar theodolite, radio direction-finder.

A thermometer which utilizes the thermal properties of gas. There are two forms of this instrument: (a) a type in which the gas is kept at constant volume, and pressure is the thermometric property, and (b) a type in which the gas is kept at constant pres ...

An aneroid barometer arranged so that the deflection of the aneroid capsule actuates a pen which graphs a record on a rotating drum. Sometimes called aneroidograph.

In thermodynamics, the integrating factor of the differential equation referred to as the first law of thermodynamics, In statistical mechanics, a measure of translational molecular kinetic energy (with three degrees of freedom). In general, the degree of ...

The distance that an observer can see vertically into a surface-based obscuring phenomenon such as fog, rain, or snow. The distance estimate must be based upon ceiling balloon ascensions or ceiling light projector measurements.

See feed.

Any sudden and heavy rain, almost always of the shower type.

Generally, an instrument designed to measure or estimate the blueness of the sky. See Linke-scale.

Electromagnetic radiation lying within the wavelength interval to which the human eye is sensitive, the spectral interval from approximately 0.4 to 0.7 microns (4000 to 7000 angstroms). Bounded on the short-wavelength end by ultraviolet radiation and on t ...

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

A method of winds aloft observation accomplished by tracking a balloon-borne radar target or radiosonde with either radar or a radio theodolite.

In general, any object that reflects incident energy. Usually it is a device designed for specific reflection characteristics.

In general, pertaining to or affording an overall view. In meteorology, this term has become somewhat specialized in referring to the use of meteorological data obtained simultaneously over a wide area for the purpose of obtaining a comprehensive and near ...

Random Access Memory. The memory of a computer which can be read and written into at any location without passing through preceding locations.