n.a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface
N
a radio wave reflected back to the earth by the ionosphere (ionospheric wave), permitting transmission around the curved surface of the earth 天波
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ground wave
The weeklong festivities include fireworks and concerts and showcase all manner of dazzling displays, from a special shape rodeo to lighted nighttime " balloon glows, " but the climax is the handful of spectacular mass ascensions in which all participants take to the sky in two waves.
Radar, or radio waves, sweep the sky every 12 seconds transmitting images of approaching aircraft that can then be viewed by controllers onscreen in a series of centers spanning the nation.