A radiosonde which transmits the indication of the meteorological sensing elements in the form of a code consisting of combinations of dots and dashes.

A reflecting type telescope with a 45

Same as contact anemometer.

See feed.

Video Display Terminal. An input and display device which includes a keyboard and a screen and allows a human to communicate with a computer.

General name for an instrument which measures the earth's magnetic field intensity.

A device for measuring the frequency of occurrence of atmospherics whose intensity is greater than a predetermined level.

A graphical aid used in fire weather forecasting to calculate the degree of forest-fire danger (or burning index). Commonly in the form of a circular slide rule, the firedanger meter relates numerical indices of (a) the seasonal stage of foliage, (b) the ...

Same as mirror nephoscope.

National Weather Service. Administered by the U.S. Department of Commerce.

A thermometer which utilizes the thermal properties of gas. There are two forms of this instrument: (a) a type in which the gas is kept at constant volume, and pressure is the thermometric property, and (b) a type in which the gas is kept at constant pres ...

Abbreviation for visual flight rules, but commonly used to refer to the relatively favorable weather and/or flight conditions to which these rules apply.

A type of precipitation composed of unbranched crystals in the form of needles, columns, or plates. Usually has a very slight downward motion and may fall from a cloudless sky.

A thermometer consisting of a clock mechanism the speed of which is a function of temperature.

A hypothetical "body" whose surface absorbs no electromagnetic radiation of any wavelength. An idealization exactly opposite to that of the black body. In nature, no true white bodies are known. Moist white pigments exhibiting high reflectivity for visibl ...

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

A set of electrical conductors, often on a backplane, that carry data and power signals among the various components of a computer.

A type of cloud height indicator which uses a searchlight to project vertically a narrow beam of light onto the cloud base. The height of the cloud is determined using a clinometer, located at a known distance from the ceiling light, to measure the angle ...

Part of a computer word that has meaning in itself, often, a byte.

Thermometer used for measuring the highest temperature attained during a given interval of time, for example, a day.