| 释义 |
Loran orig. U.S.|ˈlɔə-, ˈlɒræn|
Also loran.
[f. the initial letters of long-range navigation.]
A hyperbolic navigation system employing the difference in the times of arrival of pulsed radio signals from different stations. Freq. attrib.; also ellipt. for a Loran receiver.
[1942(title) Development of airborne receiver model LRN-1: report on project 191. (Radio Corporation of Amer. License Div. Lab. Rep. No. 207 (PB 32732), 9 Sept.).] 1943(title) Development of Loran receiver trainer: report on project 191 (extension). (Radio Corporation of Amer. License Div. Lab. Rep. (PB 23321), 17 Mar.) 1945Tuscaloosa (Alabama) News 18 Oct. 5 In the airplane, a loran receiver measures the difference in radio wave travel time in millionths of a second. 1945[see hyperbolic a. 2 b]. 1946J. P. Baxter Scientists against Time ix. 151 The beauty of Loran for wartime use was that the ship or plane which used it emitted no signal that might give away its position. 1960M. Sharcott Place of Many Winds i. 6 We passed Spring Island, where there is a Department of Transport Loran station. 1966McGraw-Hill Encycl. Sci. & Technol. VII. 585 The distance at which reliable loran fixes are generally obtained is about 800 nautical miles over water from the pair of transmitting stations during daytime and about 1500 miles at night. 1972K. Campbell Thunder on Sunday 11 ‘Get a Loran fix.’.. Peter Spence had his face glued into the rubber eye⁓piece of the Loran... He counted the jumping electric lines and the long number blips... He then transferred his eyes to the Loran map. |