airspace

領空、空域

ある場所の上空、特に国や航空機関が管理する範囲。

やさしい英語で： The area of sky above a place, especially one controlled by a country or aviation authority.

• The plane entered our airspace.
• The country closed its airspace overnight.
• Two aircraft violated national airspace yesterday.

よく使う表現： national airspace, controlled airspace, enter airspace

空域

航空機が飛ぶために設けられた空の範囲。

やさしい英語で： An area of sky set aside for aircraft to fly in.

• The drone stayed outside the designated airspace.
• Pilots must keep within the airspace reserved for this route.
• The airport needs more airspace for arriving aircraft.

よく使う表現： designated airspace, reserved airspace, airspace for aircraft

周波数帯域

ラジオやテレビの信号を送るために使える周波数の範囲。

やさしい英語で： The range of radio frequencies available for sending radio or television signals.

• The station needs more airspace.
• Several broadcasters competed for the same airspace.
• New regulations divided the available airspace among local radio stations.

類義語： broadcast spectrum

よく使う表現： available airspace, broadcasting airspace, compete for airspace