Same as instrument shelter.

See standard atmosphere.

One of the radiation laws which states that the wavelength of maximum radiation intensity for a black body is inversely proportional to the absolute temperature of the radiating black body.

A rain gauge which indicates but does not record the amount of precipitation captured.

Upwarddirected solar radiation, reflected by the earth's surface and the atmosphere.

Water vapor content of the air. See absolute humidity, dew point, mixing ratio, relative humidity, specific humidity.

Infrared radiation emitted by or being propagated through the atmosphere.

In general, the transformation of data from a "raw" form to some useable form. In meteorology, this often refers to the conversion of the observed value of an element to the value which it would theoretically have at some selected or standard level. The m ...

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

A general term for instruments designed to measure the amount of cloudiness.

Abbreviation for precipitation effectiveness index.

An absolute pyhrliometer, developed by C.G. Abbott, in which the radiation-sensing element is a blackened water-calorimeter.

Particle on which the freezing of water occurs.

Thermometer in which the difference in the rates of expansion with temperature of a liquid and its receptacle is used as a measure of the temperature. The liquid used may be ethyl alcohol, toluene, petroleum, or mercury.

The limiting values of ceiling, visibility, and wind, or runway visual range, established as safety minimum for aircraft landings and take-offs.

Amount of solar radiation incident, per unit area and time, on a surface which is perpendicular to the radiation and is situated at the outer limit of the atmosphere, the earth being at its mean distance from the sun. It equals approximately 2.00 ly/ min ...

Cathode Ray Tube. A display element, consisting of a vacuum tube and screen, used with computers.

The height at which the maximum wind speed occurs, determined in a winds-aloft observation.

A class of instruments employed to determine the electric potential at a point in the atmosphere, and ultimately the atmospheric electric field.

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