Same as dropsonde.

Routine broadcast of meteorological information for aircraft in flight.

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 ...

The state of the atmosphere, mainly with respect to its effects upon life and human activities. As distinguished from climate, weather consists of the short-term (minutes to months) variations of the atmosphere.

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 ...

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

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

Integrated Flood Observing and Warning System. National Weather Service flood warning program.

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

The water volume within a specified portion of a stream channel.

An instrument that shows changes in humidity.

See standard atmosphere.

A wooden enclosure about sixteen feet square and eight feet high with a precipitation gauge at its center. The function of the fence is to minimize eddies around the gauge and thus insure a catch that is representative of the actual rainfall or snowfall.

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

The array of indicating marks and figure in relation to which the position of an index is observed, i.e. a scale plate on a recorder.

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

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

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

Facing away from the wind.

(1) The ratio of the speeds of a chemical reaction at two temperatures differing by 10