Random Access Memory. The memory of a computer which can be read and written into at any location without passing through preceding locations.

The degree of conformity of an indicated value to an accepted standard value, or ideal value. See accuracy rating, measured accuracy.

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 forecast of weather elements of particular interest to aviation; including ceiling, visibility, upper winds, icing, turbulence, precipitation types, and storms.

Abbreviation for precipitation-evaporation quotient.

An instrument for collecting liquid water from the atmosphere.

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

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 climatic diagram whose coordinates are some form of temperature vs. a form of humidity or precipitation.

Any source of radiant energy, especially electromagnetic energy.

A standard unit of atmospheric pressure, defined as the pressure exerted by a 760 mm column of mercury at standard gravity (980.665 cm/sec2 ) at O

An apparatus, used in studying soil temperatures, for measuring the total supply of heat during a given period.

The component of the radiosonde which includes the modulating blocking oscillator and the radiofrequency carrier oscillator.

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 chronograph used to make a time-record of certain measured meteorological elements. The most common type, the triple register, records wind direction and speed, duration of sunshine, and amount of rainfall (sensed respectively by a contact anemometer, M ...

A general term for instruments designed to measure the speed or force of the wind.

An increase in the central pressure of a pressure system; opposite of a deepening. More commonly applied to a low rather than a high.

Same as instrument shelter.

A fixed-length group of bits representing the large data element handled as a unit by a computer. Word length is determined by the capacity of the CPU registers.

A tube designed to measure the rate of flow of fluids. It consists of a tube having a constriction or throat at its midsection. The difference between the pressure measured at the inlet and at the throat is a function of the fluid velocity. Compare to Pit ...