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。

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This difference allows the satellite to capture a year-round sea ice record, despite cloud cover and months of polar night.

这种差别使得卫星能够获取整年的海冰记录，除非出现云层遮蔽或极夜的月份。

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Based on satellite imagery data collected between 2000 and 2013, the index measures three different factors: air temperature, water availability, and degree of cloud cover.

这一指数以2000年到2013年之间收集的卫星图像数据为依据，测量了三种不同的因素：气温，水资源可利用量和云层覆盖度。

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Svensmark then teamed up with Friis-Christensen to review solar activity, cloud cover and cosmic ray levels recorded using satellite data available since 1979.

FORBES: Sorry, But With Global Warming It's The Sun, Stupid