A form of data transmission in which the bits of each character are sent one at a time along a single communication path. Compare to parallel data transmission.

The maximum deviation of any points from a straight line drawn as a "best fit" through the calibration points of an instrument with a linear response curve. Usually expressed as a percentage of full- scale range.

The change in the measured transducer output caused by changes in ambient temperature. Usually expressed a percentage of full scale.

A device used to hold liquid-in-glass maximum and minimum thermometers in the proper recording position inside an instrument shelter, and to permit them to be read and reset. See Townsend support.

Winds from the four cardinal points of the compass; that is, north, east, south, and west winds.

A colorless and odorless gaseous element. The lightest and apparently the most abundant chemical element in the universe. However, it is found only in trace quantities in the observable portion of our atmosphere, only about 0.00005 percent by volume of dr ...

One of several constant-pressure levels in the atmosphere for which a complete evaluation of data derived from upper air observations is required.

An instrument which measures the intensity of radiation by determining the amount of chemical change( or fluorescence produced by that radiation.

Automated Weather Observing Station. A self-contained weather station designed to make aviation weather observations without operator involvement.

A system of physical units based on the use of the centimeter, gram. and the second as elementary quantities of length. mass. and time.

Temperature assumed by an unsaturated air parcel when brought adiabatically to a standard pressure (1,000 mb).

A component of a radiosonde consisting of a series of alternate electrically conducting and insulating strips. As these are scanned by a contact the radiosonde transmits temperature and humidity signals alternately. The contact may be a baroswitch as in t ...

General name for an instrument which measures the evaporation rate of water into the atmosphere. See clay atmometer, evaporation pan, evapotranspirometer, Livingston sphere, Piche evaporimeter, radio atmometer.

A c.g.s. (centimeter-gram-second) unit of mass. Originally defined as the mass of 1 cubic centimeter of water at 4

The record obtained from a bolometer.

The range of operating conditions within which a device is designed to operate and for which operating influences are stated. See operating conditions, reference operating conditions.

Video Display Terminal. An input and display device which includes a keyboard and a screen and allows a human to communicate with a computer.

See captive balloon, ceiling balloon, constant-level balloon, free balloon, hurricane beacon, kytoon, Moby Dick balloon, pilot balloon, radiosonde balloon, rockoon, skyhook balloon, transosonde.

A thermometer consisting of a clock mechanism the speed of which is a function of temperature.

The statement that the viscosity of air is independent of the density of air.