要进一步阅读有关这次空中调查的文章，参见冰桥：记录变化中的冰，飞行监测地球。

To read more about the airborne campaign, see IceBridge: Buiding a record of Earth’s changing ice, one flight at a time on the Earth Observatory.

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遥控飞机，有的只有飞机模型那么大，有的则有美国的“捕食者”无人机和“全球鹰”无人侦察机那么大，例行地监测阳光穿过云层的情况，以及在飓风上方进行飞行。

Remotely operated planes, some the size of model airplanes and some the size of military Predators and Hawks, routinely monitor sunlight passing through clouds and fly over hurricanes.

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使用雷达的话 探测飞行器的速度变化要求跟踪监测所接收的数据 并且只能在几次位置更新后探测到。

With the radar, detecting aircraft velocity changes requires tracking the received data and can only be detected over a period of several position updates.

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