radio horizon
McGraw-Hill Science & Technology Dictionary:
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radio horizon
(′rād·ē·ō hə′rīz·ən)
(communications) The locus of points at which direct rays from a transmitter become tangential to the surface of the earth; the distance to the radio horizon is affected by atmospheric refraction.
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radio horizon
McGraw-Hill Dictionary of Aviation:
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radio horizon
The locus of points at which rays from a radio transmitter become tangential to the earth’s surface; it depends on the refractive index of the atmosphere. See radar horizon.
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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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