Orbiting camera detects reflected light to determine extent of vegetation
By Cristy Gelling
Web edition: June 21, 2013
Click here to view larger image NASA, NOAA
A new instrument onboard the NASA?NOAA Suomi satellite has been capturing exquisitely detailed views of seasonal and environmental shifts in plant cover. Light sensors on the satellite identify vegetation by detecting differences in reflected amounts of visible light, which plants absorb for photosynthesis, and near-infrared light, which plants don?t absorb. Subtle changes in greenness can give advance warning of drought or fire conditions. Meteorologists can also use data on vegetation dynamics to improve weather prediction.
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