有些则是天气或气象卫星，发射升空用于监测大气状况，并在云层形成后跟踪其运动轨迹。
Others are weather or meteorological satellites, launched to monitor the state of the atmosphere and to follow the movement of the clouds as they gather.
谷歌说，监测大气的卫星也可以向谷歌地球服务提供高清的空中图像。
And it says atmospheric satellites could also provide high-resolution aerial images for its Google Earth service.
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