- Original Caption Released with Image:
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Figure 1
Click on image for larger version
This full-frame ASTER image, acquired August 30, 2000, covers an area of
60 by 60 km in the Salmon River Mountains, Idaho. In this color infrared
composite, vegetation is red, clouds are white, and smoke from forest
fires is blue. An enlargement (Figure 1) covers an area of 12 x 15 km. A
thermal infrared band is displayed in red, a short wave infrared band is
displayed in green, and a visible band is displayed in blue. In this
combination, fires larger than about 50 m appear yellow because they are
bright in both infrared bands. Smaller fires appear green because they are
too small to be seen by the 90 m thermal pixels, but large enough to be
detected in the 30 m short wave infrared pixels. We are able to see
through the smoke in the infrared bands, whereas in the visible bands, the
smoke obscures detection of the active fires. This image is located at
44.8 degrees north latitude and 114.8 degrees west longitude.
The U.S. science team is located at NASA's Jet Propulsion Laboratory,
Pasadena, Calif. The Terra mission is part of NASA's Science Mission
Directorate.
- Image Credit:
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NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team
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