radio horizon

American  

noun

1. the locus of points on the earth's surface where rays from a transmitting antenna are tangent to the surface. The radio horizon for a fixed antenna varies with refraction by the atmosphere of radio waves.

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Example Sentences

See Examples For:

radio horizon

"It allows for operations at very low altitudes -- it is controlled by a signal from space, bypassing the radio horizon and the Earth's curvature -- factors that otherwise limit ground-based remote control signals."

From Barron's ● Oct. 14, 2026

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