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File:Echo - A Passive Communications Satellite - GPN-2002-000122.jpg

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English: Echo, NASA's first communications satellite, was a passive spacecraft based on a balloon design created by an engineer at NASA's Langley Research Center. Made of Mylar, the satellite measured 100 feet (30 meters) in diameter. Once in orbit, residual air inside the balloon expanded, and the balloon began its task of reflecting radio transmissions from one ground station back to another. Echo 1 satellites, like this one, generated a lot of interest because they could be seen with the naked eye from the ground as they passed overhead.
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Author NASA
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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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This image or video was catalogued by Goddard Space Flight Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: GPN-2002-000122 and Alternate ID: G-63-3202.

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current22:55, 9 April 2009Thumbnail for version as of 22:55, 9 April 20091,800 × 1,366 (1.1 MB)BotMultichillT (talk | contribs){{Information |Description={{en|1=Echo, NASA's first communications satellite, was a passive spacecraft based on a balloon design created by an engineer at NASA's Langley Research Center. Made of Mylar, the satellite measured 100 feet (30 meters) in diame

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