- Original Caption Released with Image:
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Figure 1 |
Figure 2 |
These images of the Saline Valley area, California, were acquired March
30, 2000 and cover a full ASTER scene (60 by 60 km). Each image displays
data from a different spectral region, and illustrates the complementary
nature of surface compositional information available as a function of
wavelength. This image displays visible and near infrared bands 3, 2, and
1 in red, green, and blue (RGB). Vegetation appears red, snow and dry salt
lakes are white, and exposed rocks are brown, gray, yellow and blue. Rock
colors mainly reflect the presence of iron minerals, and variations in
albedo. Figure 1 displays short wavelength infrared bands 4, 6, and 8 as
RGB. In this wavelength region, clay, carbonate, and sulfate minerals have
diagnostic absorption features, resulting in distinct colors on the image.
For example, limestones are yellow-green, and purple areas are
kaolinite-rich. Figure 2 displays thermal infrared bands 13, 12 and 10 as
RGB. In this wavelength region, variations in quartz content appear as
more or less red; carbonate rocks are green, and mafic volcanic rocks are
purple. The image is located at 36.8 degrees north latitude and 117.7
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
Image Addition Date:
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2001-10-22
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