________ systems,both terrestrial and celestial,transmit high-frequency radio signals through the atmosphere and are widely used for high-volume,long-distance,point-to-point communication.

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The Answer of ________ systems,both terrestrial and celestial,transmit high-frequency radio signals through the atmosphere and are widely used for high-volume,long-distance,point-to-point communication.

________ Systems,both Terrestrial and Celestial,transmit High-Frequency Radio Signals Through the Atmosphere