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晴朗的夜空,当你抬头仰望满天星斗时,有时会看到一种移动的星星,这种奇特的星星并不是宇宙问的星球,而是人类挂上天宇的明灯——人造地球卫星,它们巡天邀游,穿梭往来,忠实地为人类服务,给冷寂的宇宙增添了生气和活力.人造卫星是一个兴旺的家族,如果按用途分,它可分为三大类:科学卫星、技术试验卫星和应用卫星。其中应用卫星是直接为人类服务的卫星,它的种类最多,数量最大,其中包括通信卫星、气象卫星、侦察卫星、导航卫星、测地卫星、地球资源卫星、截击卫星等等.
On a clear night sky, when you look up at the starry sky, you sometimes see a moving star that is not the planet of cosmic interplanetary but the beacon of mankind’s sky-man-made earth satellites It is an exciting family that can be divided into three major categories according to its purpose: scientific satellites, technology experimental satellites And application of satellite. Among them, the application satellite is a satellite directly serving human beings. It has the largest number and the largest number of types, including communications satellites, meteorological satellites, reconnaissance satellites, navigation satellites, geodetic satellites, Earth resources satellites, intercepting satellites, and the like.