| 单词 | pilot balloon |
| 释义 | > as lemmaspilot balloon pilot balloon n. a small balloon used for signalling, to test the wind direction, or (now usually) to carry instruments to record or transmit data about the atmosphere; a ballon-sonde; also figurative. ΘΚΠ the world > the earth > weather and the atmosphere > weather > study or science of weather > meteorological instruments > [noun] > upper air wind instruments pilot balloon1802 rawin1967 1802 Sporting Mag. 20 295/1 A Pilot Balloon, as it is called, was first launched. 1846 C. G. F. Gore Sketches Eng. Char. (1852) 155 To..send up..such a pilot-balloon as might fore-arm and forewarn his patron of the object of their mission. 1924 J. E. Hodgson Hist. Aeronaut. Great Brit. i. 22 The use of pilot balloons, or ballons-sondes, capable of carrying recording instruments to immense heights. 1993 Philos. Trans. (Royal Soc.) B. 340 399/2 A pilot balloon tracked by the scanning radar provided an estimate of the wind velocity. < as lemmas |
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