| 释义 |
rawin Meteorol.|ˈreɪwɪn|
[f. radar + wind n.1]
A determination of the atmospheric wind speed and direction made by tracking a balloon-borne target with radar; also transf., the instrument itself.
1946Bull. Amer. Meteorol. Soc. XXVII. 371/1 A system of obtaining winds-aloft reports by electronic means known as rawins is now gaining great favor. 1948T. A. Blair Weather Elements (ed. 3) iii. 70 By the use of radar methods developed during World War II, a balloon carrying a radar target (reflector) can be followed through and above the clouds, making possible the determination of upper-air wind direction and force in all kinds of weather... Such soundings are known as rawins. 1951Jrnl. Meteorol. VIII. 126/1 Monthly resultant rawins for 24 United States stations were obtained for the layer surface to 10,000 ft and for the 10,000-ft level. 1967R. W. Fairbridge Encycl. Atmospheric Sci. 581/1 It [sc. a radiosonde] consists of a small radio transmitter sent aloft by a helium or hydrogen-filled balloon which transmits the values of the meteorological elements in code to ground stations. If the instrument is tracked by radar to determine wind speed and direction aloft, it is called a rawin. If the two are combined in one, it is called a rawinsonde. 1979C. Kilian Icequake vi. 103 A few tractors and a collapsed rawin tower were all that was left of the station. |