Any meteorological instrument, such as a radiosonde, in which the recording apparatus is located at some distance from the measuring apparatus.

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

A measurement of atmospheric conditions aloft, above the effective range of a surface weather observation. Elements evaluated include temperature, humidity, pressure, wind speed, and wind direction.

The wind speed and direction at various levels in the atmosphere above the level reached by surface weather observations.

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

A photometer that measures the received intensity of a distance tight source.

Tables prepared from the psychrometric formula and used to obtain vapor pressure, relative humidity, and dew point from values of wet-bulb and dry-bulb temperatures.

A radiosonde equipped to measure temperature only.

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

The actual lifting force of an inflated balloon, usually expressed in grams.

A balloon designed to float at a constant pressure level. This may be accomplished by a pressure valve which controls the release of ballast so as to maintain flight above a selected pressure level until the supply of ballast is exhausted. See Moby Dick b ...

Companion to the wet-bulb thermometer in a psychrometer. Used to measure ambient air temperature.

The amount of precipitation captured by a rain gauge.

Having a specific relationship to a time base or clock. In synchronous communications, data characters are sent according to a timing signal which synchronizes the two communicating devices.

A numbering system using a base number of 16 and including the ten decimal digits (0 to 9) along with six alpha digits (A to F). Thus. a digit is available to represent each of the possible values of a 4-bit binary digit.

A momentary decrease in the speed of the wind.

The most common of the principal rainbow phenomena, which appears as an arc of about 42

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

A spring which is designed to achieve a fixed spring constant over a wide temperature range. Usually, this involves an alloy with high nickel content such as Ni-Span C. It is common for these springs to be stress relieved at elevated temperature after for ...

Any and all forms of water particles, liquid or solid, that fall from the atmosphere and reach the ground.