The unit of force in the centimeter-gram-second system of physical units, i.e. one gm cm per sec2, equal to 7.233 x 10-5 poundal.

A point (or line) on a scale used for reference or comparison purposes. In calibration of meteorological thermometers, for example, the fiducial points are 100

A type of pressure-plate anemometer in which the plate, restrained by a stiff spring, is held perpendicular to the wind. The wind-activated motion of the plate is measured electrically. The natural frequency of this system can be made high enough so that ...

A conically shaped, copper rain gauge shield.

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

An instrument for recording global solar radiation.

See evaporative opportunity.

A common type of liquid-inglass thermometer, used, in meteorology, in psychrometers and as a maximum thermometer.

An instrument for determining the direction from which radio waves approach a receiver. It may consist of a manually operated direction indicator, or it may use a servo system to position the antenna automatically in the direction of the incident waves.

A thermometer with a muslin-covered bulb which is moistened. used to measure wet-bulb temperature.

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

Extended Binary Coded Decimal Interchange Code. A standard code used to represent data using 8 bits per character.

An instrument which measures the effective terrestrial radiation. See Angstrom pyrgeometer.

The correctable part of the inaccuracy of an instrument.

Same as marine rainbow.

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

Precipitation caused by the ascent of moist air over an orographic barrier such as a Mountain range.

Same as instrument shelter.

A method of winds aloft observation accomplished by tracking a balloon-borne radar target or radiosonde with either radar or a radio theodolite.

A conductor or system of conductors for radiating and/or receiving radio energy. Also called aerial.