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

A line drawn through geographical points where a given seasonal biological event occurs on the same date.

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 anemometer in which the sensor rotation is transmitted to a mechanical counter which directly integrates the air movement past the sensor. Used to determine total air passage (wind run). Average wind speed can be calculated from the difference between ...

That horizontal wind velocity at which the Coriolis acceleration exactly balances the horizontal pressure force. It is directed along contour lines or isobars.

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

The audio-frequency signal transmitted by the Diamond-Hinman radiosonde when the baroswitch pen passes each fifth contact of the commutator up to a number determined by the design of the commutator. It then signals every contact except the fifth, which is ...

The process by which water in plants is transferred as water vapor to the atmosphere. Also, the amount of water so transferred.

An instrument used for measuring geometric angles. See radio direction-finder.

An instrument which determines the black-body temperature of a substance by measuring its thermal radiation.

A set of weekly colored rainbow arcs sometimes discernable inside a primary rainbow.

Same as Aeolian.

A rocket designed primarily for routine upper air observations in the lower 250,000 feet of the atmosphere, especially that portion inaccessible to balloons (above 100,000 feet).

An instrument that shows changes in humidity.

Instrument for measuring the mean intensity of glo global solar radiation (direct and diffuse) near the earth's surface in a specified time interval.

The direction, with respect to magnetic north, from which the wind is blowing. Distinguish from true wind direction.

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

Area of a computer or other device where various logic and control elements are interconnected. Often a printed circuit board into which other circuit boards plug at right angles.

Defect in the action of an aneroid barometer resulting in a sluggish adjustment of the index toward the correct reading when the barometer is subjected to a large and rapid change in pressure.

force wind-Wind with a speed above 64 knots (73 mph); Beaufort scale numbers 12 through 17.