| 单词 | direction-finding |
| 释义 | > as lemmasdirection-finding direction-finder n. Telecommunications a receiving device that determines from which direction radio waves come to it; so direction-finding. ΘΚΠ the world > space > direction > [noun] > finding direction orientation1883 self-orientation1886 direction-finding1913 orienting1977 the world > space > direction > [noun] > finding direction > device for finding direction orientator1844 locator1904 direction-finder1913 D.F.1920 1913 Year-bk. Wireless Telegr. & Teleph. 307 Direction-finding from ship-board. 1913 Year-bk. Wireless Telegr. & Teleph. 316 The uses of the direction-finder. 1919 R. Stanley Text-bk. Wireless Telegr. (ed. 2) II. 270 A direction-finding aerial system. 1920 Discovery May 131/2 The Marconi direction-finder not only receives wireless signals; it also indicates the direction of the sending station. 1921 L. B. Turner Wireless Telegr. 178 Direction-finding stations on land..are usually grouped in pairs at the ends of a suitable base line, so that the intersection of the two orientations determined gives the position of the source of signal, e.g. a ship or an aeroplane. 1935 Discovery June 155/2 The practical problems of direction-finding are closely connected with the vagaries of the waves returned from the ionosphere, and continued success has been attained in the development of direction-finders less subject to the errors produced by these waves. 1946 Electronic Engin. 18 20 An automatic V.H.F. direction finder. 1966 M. R. D. Foot SOE in France x. 324 He tried to get in touch with Dowlen; but Dowlen was caught by direction-finders. < as lemmas |
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