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true horizon

   Also found in: Dictionary/thesaurus, Medical, Legal, Financial 0.01 sec.
true horizon [′trü hə′rīz·ən]
(optics)
The boundary of a horizontal plane passing through a point of vision, or in photogrammetry, the perspective center of a lens system.


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Look Down the Runway - Looking down the runway when landing an airplane is another great tip to getting the timing of your flare right - it gives you a better reference to the true horizon than looking at the ground rushing up beneath you.
In that position, he tests their ability to line up vertical dots in a slanted matrix in a darkened room where they have no clue concerning the true horizon.
 
 
 
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