The satellite also tracks the amount of cloud cover all over the world.
这个卫星还能测出全世界总的云量。
Weather observations are few in number, but the satellite-based cloud observations show a zigzag series of ups and downs in the average cloud amount where the path crosses between the two countries.
天气观测总数上是很少的，但是基于卫星的云量观测显示，在这两个国家之间的食径穿过的地方，平均云遮比呈现出一个高低起伏的之字形。
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