The transmission of data collected at a remote location over communications channels to a central station.

Occupational Safety and Health Administration. A regulatory office of the U.S. Department of Labor.

The attenuation of light.

The distance or length of flow of the air past a point during a given interval of time.

A recording weight barometer.

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

Routine broadcast of meteorological information for aircraft in flight.

Sir Napier Shaw's name for the approximate absolute temperature scale,

The process by which small particles suspended in a medium of a different refractive index diffuse a portion of the incident radiation in all directions. In scattering no energy transformation results, only a change in the spatial distribution of the radi ...

An instrument that shows changes in humidity.

An instrument for the measurement of the rate of ice accretion on an unheated body.

A self-recording thermometer.

Facing away from the wind.

A temperature-sensing element which converts thermal energy directly into electrical energy. In its basic form it consists of two dissimilar metallic conductors connected in a closed loop. Each junction forms a thermocouple. If one thermocouple is maintai ...

The lowest level at which the wind becomes geostrophic in the theory of the Ekman spiral. Also called gradient wind level.

A coating of ice, generally clear and smooth. formed by the freezing of supercooled water on a surface.

That part of an audio-modulated radiosonde consisting of the baroswitch, the sensing elements, the reference elements, and the relay.

Emission or transfer of energy in the form of electromagnetic waves or particles.

A power supply which achieves its output regulation by means of one or more active power handling devices which are alternately placed in the "off" or "on" states. It is more efficient than linear supplies which vary the conduction of power devices to ach ...

Same as dropsonde.