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 ...

Anemometer whicb measures wind speed by measuring the degree of cooling of a metal wire heated by an electric current. A type of cooling power anemometer.

A protocol similar to RS232 which makes use of differential transmission to provide high speed data transmission over significantly longer distances.

The element directly responsive to the value of the measured variable.

A high-altitude sounding system consisting of a small solid- propellant research rocket carried aloft by a large plastic balloon. The rocket is fired near the maximum altitude of the balloon flight.

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

Temperature of equilibrium between the liquid and vapor phases of a substance at a given pressure.

An instrument which determines the black-body temperature of a substance by measuring its thermal radiation.

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

A line of equal or constant pressure.

Winds which, over a small area, differ from those which would be appropriate to the general pressure distribution.

A clock-driven device for recording the time of occurrence of an event or the time interval between the occurrence of events.

A large plastic constant-level balloon for duration flying at very high altitudes.

A self-recording instrument used on aircraft for the simultaneous recording of atmospheric pressure, temperature, and humidity.

The frequency of a carrier wave.

The audio-frequency signal transmitted by the Diamond-Hinman radiosonde when the baroswitch pen passes each fifteenth contact of the commutator, up to a number determined by the design of the commutator, and each fifth contact thereafter. This signal is t ...

In thermodynamics, the integrating factor of the differential equation referred to as the first law of thermodynamics, In statistical mechanics, a measure of translational molecular kinetic energy (with three degrees of freedom). In general, the degree of ...

A radar term for a single pulse of radio energy.

Same as parhelion.

An aneroid barometer arranged so that the deflection of the aneroid capsule actuates a pen which graphs a record on a rotating drum. Sometimes called aneroidograph.