Sounding balloon
Sound´ing bal`loon´
1. | An unmanned balloon sent aloft for meteorological or aëronautic purposes. |
单词 | sounding balloon | |||
释义 | Sounding balloonSound´ing bal`loon´
Sounding Balloonsounding balloon[′sau̇nd·iŋ bə‚lün]Sounding Balloona rubber, usually hydrogen-filled balloon carrying a meteorograph and released in free flight to measure atmospheric parameters. The balloon bursts when it reaches a certain altitude, and the meteorograph descends to earth by parachute with a tape recording that is subsequently processed. With the introduction of radiosondes, the use of sounding balloons was virtually discontinued. |
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