单词 | plan position indicator |
释义 | > as lemmasplan position indicator plan position indicator n. a screen on which is shown a maplike display of the positions of objects detected by a rotating radar scanner. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instruments for projecting image > [noun] > visual display units screen1925 plan position indicator1942 scope1945 1942 Instr. Bk. for Navy Models ASG, ASG-1, Aircraft Radar Equipm. (Philco Corp. for U.S. Navy Bureau of Ships) iii. 8/2 The Receiver-Indicator contains a Plan Position Indicator..for the use of the Radar operator. 1974 Sci. Amer. Apr. 51/2 The task selected by Beatty was the familiar one of detecting ‘targets’ simulating aircraft on the cathode ray screen of a radar plan-position indicator, similar to the screens monitored by air-traffic controllers at most airports. 1980 J. H. Crook Evol. Human Consciousness ii. 24 This process seems to occur in much the same way as a plan position indicator in a radar system monitors the movement of targets recorded on the radar sets by reference to the stable map of the background locality. < as lemmas |
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