radiosonde

radiosonde
/ray"dee oh sond'/, n. Meteorol.
an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure, and humidity by means of a small radio transmitter. Cf. rawinsonde
[1935-40; RADIO- + SONDE]

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      balloon-borne instrument for making atmospheric measurements, such as temperature, pressure, and humidity, and radioing the information back to a ground station. Special helium-filled meteorological balloons made of high-quality neoprene rubber are employed for elevating the radiosonde to very high altitudes of around 30,000 m (100,000 feet); maximum altitude for balloon-borne radiosondes is about 50,000 m.

      Two basic systems are used for collecting data and coding it for transmittal. In the mechanical type, the thermometer is usually a bimetallic strip or a stretched wire, the humidity element a hair or goldbeater's skin hygrometer, and the pressure system an aneroid type of capsule. In the electrical change type system, a mechanical bellows, responsive to changes in atmospheric pressure, operates a switching arrangement to alternately transmit measurements of temperature and humidity; the temperature is indicated by a temperature-sensitive resistor and the humidity by a humidity-sensitive arrangement consisting of a strip of polystyrene coated with lithium chloride. Wind velocity can be determined by tracking the radiosonde with a theodolite or with an automatic tracking antenna.

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Universalium. 2010.

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  • radiosonde — [ radjosɔ̃d ] n. f. • 1935; de radio et sonde ♦ Appareil émetteur placé dans un ballon sonde et transmettant au sol des renseignements météorologiques. ● radiosonde nom féminin Instrument emporté en ballon dans l atmosphère, muni de dispositifs… …   Encyclopédie Universelle

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  • Radiosonde — Ra|dio|son|de 〈f. 19〉 Gerät zur meteorolog. Beobachtung, das aus einem Ballon, Messgeräten für Luftdruck, Temperatur u. Feuchtigkeit u. einem Sender besteht, der die ermittelten Werte zur Erde funkt * * * Ra|dio|son|de, die (Technik, Meteorol.):… …   Universal-Lexikon

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  • radiosonde — radiozondas statusas T sritis Standartizacija ir metrologija apibrėžtis Aerologinis įtaisas, matuojantis atmosferos slėgį, oro temperatūrą, santykinį drėgnį ir automatiškai radijo bangomis perduodantis šiuos parametrus iš įvairių atmosferos… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

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  • radiosonde — radiozondas statusas T sritis fizika atitikmenys: angl. radio wind flight; radioballoon; radiosonde vok. Funksonde, f; Radiosonde, f rus. радиозонд, m pranc. radiosonde, f …   Fizikos terminų žodynas

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