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

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).

A set of rules or conventions used to standardize data transfer between devices.

The older name for the Celsius temperature scale. Officially abandoned by international agreement in 1948, but still in common use.

The process by which events in the real world are translated into machine-readable signals.

A measure of the relative power, or of the relative values of two flux densities, especially of sound intensities and radar power densities. The decibel is derived from the less frequently used unit, the bel, named in honor of Alexander Graham Bell.

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

pattern barometer-Mercurial barometer with a fixed scale and cistern and which therefore requires only one adjustment before each reading.

Technically, the temperature registered by the dry-bulb thermometer of a psychrometer. However, it is identical with the temperature of the air and may also be used in that sense.

Turbulence encountered by aircraft when flying through air space devoid of clouds. Thermals and wind shear are the main causes.

A semiconductor which exhibits rapid and extremely large changes in resistance for relatively small changes in temperature.

A wind blowing in a direction perpendicular to the course of a moving object.

A wave resulting from the action of wind on a water surface.

A type of directional antenna used on some types of radar and radio equipment consisting of an array of elemental, single- wire dipole antennas and reflectors.

A cup anemometer with its shaft mechanically coupled to a magneto.

Same as contact anemometer.

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

A wave disturbance in airflow due to some barrier in the flow. i.e. a hill or mountain.

A series of Nansen-bottle water samples and associated temperature observations resulting from one release of a messenger.

Capacity of a soil or other surface to be penetrated by water sinking into the ground under the force of gravity. It thus expresses the rate of percolation.