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

A device which automatically records the water equivalent of snow on a given surface as a function of time. A small sample of a radioactive salt is placed in the ground in a shielded collimator which directs a beam of radioactive particles upwards. A Geig ...

See gain.

An evaluation of upper air temperature, pressure, and humidity from radio signals received from a balloon- borne radiosonde.

A hydrostatic principle that pressure supplied to an enclosed fluid is transmitted undiminished to every portion of the fluid and to the walls of the containing vessel.

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. T ...

Same as humidity strip.

A rainbow formed by light rays which have been reflected from an extended water surface. Not to be confused with a reflected rainbow whose image may be seen in a still body of water. The center of a reflection rainbow is at the same elevation as the sun b ...

An instrument for the measurement of the net flux of downward and upward total (solar and terrestrial) radiation through a horizontal surface.

Same as wave pole.

The lowest value of a measured quality at which a sensor responds. Compare to tracking.

Navy Operational Global Atmospheric Prediction System. A global meteorological model operated by the Department of Defense.

A measure of the amount of "spin" (or rotation) in the atmosphere.

That temperature at which, in a specified latitude, the reading of a particular barometer requires no temperature or latitude correction.

The addition of one or more redundant bits to information to verify its accuracy.

An instrument for measuring radiant energy. See actinometer, Dines radiometer, photometer, Tulipian radiometer.

Barometer in which pressure is determined by balancing air pressure against the weight of a column of mercury in an evacuated glass tube.

A rainbow of angular radius of about 50

An instrument, dropped from high attitude and carried by a stable parachute. used to measure the vertical component of turbulence aloft.

Abbreviation for mean sea level.