Scattered wave communication

Japanese: 散乱波通信 - さんらんはつうしん（英語表記）scattered wave communication

Radio waves that are diffusely reflected when they enter the troposphere or ionosphere are called scattered waves, and this type of communication makes use of these scattered waves. Although the energy of scattered radio waves is very weak, communication over long distances is possible with a highly sensitive receiver. Radio waves of several tens to 100 MHz can reach distances of several thousand kilometers. Compared to communications that use lower frequencies, it is less affected by disturbances in the atmosphere or ionosphere. [Miyakawa Hiroshi]

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

電波が対流圏や電離層に入射したときに乱反射したものを散乱波といい，この散乱波を利用して行う通信。散乱された電波のエネルギーは微弱であるが，高感度の受信機によって遠距離まで通信できる。数十～100MHzの電波によって数千km程度の到達距離が得られる。低周波数を用いる通信に比べて大気や電離層のじょう乱の影響をあまり受けない。【宮川洋】

出典　株式会社平凡社世界大百科事典第２版について　情報

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