Do satellites simply take pictures of clouds?

Dateline article| David Murphy|

The answer is usually NO. While some satellites photograph clouds, most use infrared sensors that detect temperatures of clouds and use this information to paint a computerized picture of cloud cover. The main advantage of infrared is that an image can be generated at any time, day or night. In order to take an actual photograph, the sun must be up. But both photographs and infrared images have unique uses.

---D.M.

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