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Terra Takes First Peek at Earth By SPACE.com Staff
posted: 06:17 pm ET 10 March 2000
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Terra Gives First Peek at EarthNASA released on Friday the first engineering images from its $1.3 billion Terra mission -- an ambitious satellite designed to give scientists the tools to simultaneously take the pulse of the worlds lands, oceans, ice and atmosphere. The first-light images show everything from the Mississippi River spilling sediment into the Gulf of Mexico to the delicate geology of the Rift Valley in Ethiopia to a global view of the amount of heat Earth loses to space. "They show that the Terra instruments, with their delicate optics and electronics, made it safely to space," said Yoram Kaufman, Terras project scientist at NASA Goddard Space Flight Center, in a prepared statement. "The images give us a glimpse on the unprecedented clarity and richness of the data that we anticipate from Terra in the months and years to come." Terra reached its final orbit on February 23, and began putting its five science instruments to work a day later. Terra was launched December 18, 1999 from Vandenberg Air Force Base, California. MODIS The satellites Moderate-Resolution Imaging Spectroradiometer (MODIS) snapped the Mississippi delta in one of its first images (below) taken on February 24. The image shows the mighty river as it flows into the Gulf of Mexico near New Orleans.  MISR Terras Multi-angle Imaging Spectroradiometer (MISR) captured a view of an ice-choked James Bay in Ontario on February 24, including crescent-shaped Akimiski, one of several islands surrounded by the ice. 
CERES The Clouds and the Earths Radiant Energy System (CERES) instrument opened up on February 25, measuring the globes total radiation, including radiated heat and reflected sunlight. 
ASTER The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) provides the highest resolution images of any of Terras instruments. The instrument has provided a nocturnal view of the Ethiopian coast on the Red Sea, showing the surface temperatures of various materials. 
One of the instruments most colorful views of Ethiopias Rift Valley. Acting as a spaceborne geologist, the instrument pinpoints various rock types, including andesite and basalt. 
MOPITT The Measurements of Pollution in the Troposphere (MOPITT) instrument has also been turned on. Eventually it will give measurements of the amount of carbon monoxide and methane in the atmosphere. Once in full swing, Terra will crank out 6 terabytes (6 trillion bytes) of data each month. NASA will make its first release of Terra science imagery next month, just prior to Earth Day. "Terra" means "Earth" in Latin.
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