Hyperspectral Imaging

The Hyperion instrument aboard NASAs EO-1 satellite sees the Earth from space in a new way. Instead of detecting light in only 3—or even 30—wavelengths, it detects 220 distinct wavelengths of light. So many, in fact, that it observes a virtually continuous spectrum of light from.4 µm (blue) to 2.5 µm (mid-infrared). The image above shows a true-color Hyperion image of Argentina (composed of red, green, and blue channels). Superimposed on the image is the spectrum of light reflected from the area highlighted in orange (white line). Compare that to the spectrum of water (blue line), vegetation (green line), and fallow land (yellow line). Known as hyperspectral data, Hyperions measurements will enable scientists to distinguish different types of surface features—not only vegetation from water, but also soybeans from corn, pine trees from oaks, and sand from dust. For more information, read: EO-1 Fact Sheet from the Earth Observatory EO-1 Home Page http://eo1.gsfc.nasa.gov/Technology/Hyperion.html Hyperion information page
Source: Image and animation courtesy Tom Bridgman, Goddard Scientific Visualization Studio, based on data from the EO-1 science team

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