ECHO I, NASA's first communications satellite, ?

ECHO I, NASA's first communications satellite, was a passive spacecraft based on a Mylar balloon design. Launched in 1960, ECHO I expanded to a balloon with a 100 foot diameter that reflected radio transmissions from one ground station back to another

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Diameter Echo Expanded Launched Nasa Nasas Orbit Passive Reflected Reflective Satellite Shiny Spacecraft Sphere Transmissions

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