angle of elevation
McGraw-Hill Science & Technology Dictionary:
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angle of elevation
(′aŋ·gəl əv ′el·ə′vā·shən)
(engineering) The angle in a vertical plane between the local horizontal and an ascending line, as from an observer to an object; used in astronomy, surveying, and so on. Also known as ascending vertical angle; elevation angle.
(ordnance) The vertical angle above the line of sight through which the axis of the gun bore must be raised so that the bullet or projectile will carry to the target. In aerial gunnery, an acute angle between the bore axis of a gun and the horizontal; called quadrant elevation in ground gunnery.
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angle of elevation
McGraw-Hill Dictionary of Aviation:
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angle of elevation
The angle in a vertical plane between the local horizontal and an ascending line, as from an observer to an object. A negative angle of elevation is usually called an angle of depression.
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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